Patent Publication Number: US-7581843-B2

Title: Electrical fixture assembly adapted to be modified to comply to a power usage limit

Description:
FIELD OF THE INVENTION 
     The invention relates to an electrical fixture and, more particularly, to an electrical fixture (such as a lighting fixture) adapted to be modified to comply to a power usage limit associated with a power distribution circuit branch and to designing a circuit load with one or more of the aforementioned electrical fixtures. 
     BACKGROUND OF THE INVENTION 
     An electrical lighting fixture (i.e., a track lighting fixture, a recessed lighting fixture, or other lighting fixture for installation in a room) must be labeled to show the lamp types and maximum wattage allowed for safe operation of the lighting fixture in accordance with the listing requirements specified by one or more testing and compliance agencies, such as Underwriters Laboratories, Inc., Canadian Standards Association, and ETL Testing Laboratories. A conventional fixture suitable for use in a track lighting system or a recessed lighting system often has multiple lamps and various wattages listed for use in the respective fixture. In addition, with respect to recessed lighting fixtures, one or more varieties of trim styles are typically listed to be used in conjunction with the respective recessed lighting fixture. Each trim style may have the ability to operate with a variety of lamp types and varying wattages. In accordance with testing and compliance agency requirements, the trim style, lamp type, and lamp wattage information for a lighting fixture must be clearly identified on the lighting fixture and visible to the installer, inspector and end user. Conventional lighting fixtures typically have this information printed on one label affixed to the respective fixture and in a format required to comply with the listing standards of any one of the authorized testing and compliance agencies. Once the conventional lighting fixture is installed, the one label provides the guidelines for the specific lamp types and associated wattage ratings that may be used in the fixture to operate safely in compliance with the applicable lighting standard of the agency that approved the use of the fixture. 
     In addition to lighting fixture standards for safe operation, existing energy codes (e.g., American Society of Heating, Refrigerating &amp; Air Conditioning Engineers Energy Standard, California&#39;s Energy Efficiency Standards for Residential and Non-residential Buildings, and other state energy standards) have been revised, along with the introduction of new energy codes which address the maximum allowable wattage per fixture/circuit combination for a prescribed commercial facility. (i.e. whole building or defined space). Formulas such as Unit Power Density (UPD) or Watt/ft2 were created to control the maximum allowable wattage per space or building. Different wattage allowance were applied to, but not limited to, specific spaces, such as commercial offices, hospitals, retail buildings, and manufacturing facilities. At the time of final inspection, the maximum wattage rating for each lighting fixture (which may not correspond to the wattage of the lamp installed in the fixture) is identified by the inspector as the applicable power limit to verify the lighting fixture is installed in compliance with the applicable energy code. This method of energy code compliance verification was adopted in most states based on the fact that the end user could, after the initial inspection was performed to verify the applicable power level for a fixture, replace a lower wattage rated lamp currently installed in the fixture with another lamp having the maximum wattage identified on the one label affixed to the fixture, violating the requirements of the applicable energy code. Assessing the power level limit for energy consumption based on the lighting fixtures maximum wattage rating has caused building lighting designers to request properly labeled lighting fixtures for new and remodeled buildings in accordance with the applicable energy codes. In response to these requests, electrical contractors typically order specially labeled lighting fixtures to denote the designed power limit or new maximum wattage rating for the respective fixture. As a result, lighting manufacturers often are required to make low volumes of specially labeled lighting fixtures having different maximum wattages, resulting in manufacturing efficiency problems and increased inventories of fixtures that increases the cost of manufacturing. Manufacturers of other electrical fixtures, such as room exhaust fans, ceiling fans, and heating fixtures, have experienced similar problems. 
     Therefore, a need exists for an electrical fixture assembly that overcomes the problems noted above and others previously experienced for modifying an electrical fixture, such as a lighting fixture, to comply with a power usage limit associated with an energy code requirement. These and other needs addressed by an electrical fixture consistent with the present invention will become apparent to those of skill in the art after reading the present specification. 
     SUMMARY OF THE INVENTION 
     The foregoing problems are solved and a technical advance is achieved by the present invention. In accordance with articles of manufacture consistent with the present invention, an electrical fixture assembly is provided. The electrical fixture assembly comprises an electrical fixture having a surface, and a label adapted to be applied to the surface. The label has a plurality of sections. Each section identifies a respective one of a plurality of power usage limits for operating the electrical fixture in a circuit. At least one of the sections is adapted to be removed from the label when the power usage limit identified by the respective section exceeds another power usage limit associated with the electrical fixture when installed in the circuit. In one implementation, the label is visible to a user when the label is applied to the surface and the electrical fixture assembly is installed in the circuit. 
     In accordance with methods consistent with the present invention, a method is provided for modifying an electrical fixture to comply with a power usage limit assigned to the electrical fixture for operation in a circuit. The method comprises associating a label with the electrical fixture. The label has a plurality of sections. Each section identifies a respective one of a plurality of power usage limits for the lighting fixture. The method further comprises removing from the label each section identifying a respective one of the power usage limits that exceeds the power usage limit assigned to the electrical fixture. 
     In accordance with articles of manufacture consistent with the present invention, a lighting fixture assembly is provided. The lighting fixture has a surface, and a label adapted to be applied to the surface. The label has a plurality of sections. Each section identifies a respective one of a plurality of power usage limits for operating the lighting fixture in a circuit. Each section except for a first section is adapted to be removed from the label when the power usage limit identified by the respective section exceeds another power usage limit associated with the lighting fixture when installed in the circuit. 
     Other systems, assemblies, methods, features, and advantages of the present invention will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, assemblies, methods, features, and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an implementation of the present invention and, together with the description, serve to explain the advantages and principles of the invention. In the drawings: 
         FIG. 1  is a block diagram depicting an electrical power distribution system having one or more electrical fixture assemblies, each adapted to be modified to comply with a respective power usage limit in accordance with the present invention; 
         FIG. 2A  is a block diagram depicting one embodiment of an electrical fixture assembly in  FIG. 1  adapted to be modified to comply with a respective power usage limit in accordance with the present invention; 
         FIG. 2B  is a block diagram depicting another embodiment of an electrical fixture assembly in  FIG. 1  adapted to be modified to comply with a respective power usage limit in accordance with the present invention; 
         FIG. 2C  is a block diagram depicting another embodiment of an electrical fixture assembly in  FIG. 1  adapted to be modified to comply with a respective power usage limit in accordance with the present invention; 
         FIG. 3  depicts one embodiment of a label suitable for use with each of the electrical fixtures assemblies shown in  FIGS. 1 ,  2 A,  2 B, and  2 C to enable the respective fixture assembly to be modified to comply with a respective power usage limit in accordance with the present invention; and 
         FIG. 4  depicts another embodiment of a label suitable for use with each of the electrical fixture assemblies shown in  FIGS. 1 ,  2 A,  2 B, and  2 C to enable the respective fixture assembly to be modified to comply with a respective power usage limit in accordance with the present invention; and 
         FIG. 5  depicts a process for modifying an electrical fixture to comply with a power usage limit assigned to the electrical fixture for operation in a circuit in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As described above, compliance agencies and energy codes identify maximum allowable power usage limit or wattage per electrical fixture in a distribution branch circuit for a prescribed commercial facility (i.e., an entire building, or a defined space or room within the building).  FIG. 1  depicts an exemplary electrical power distribution system  100  having one or more electrical fixture assemblies  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , and  108   a - 108   n , each adapted to be modified to comply with a respective power usage limit in accordance with the present invention. The electrical power distribution system  100  may be implemented in a commercial building, a residential home, or other facility in accordance with applicable state or local electrical and energy codes. The electrical power distribution system  100  includes a main circuit breaker box  102  that distributes electrical power received from A/C power supply lines  104  to one or more branch circuits  112 ,  114 ,  116 , or  118  (either directly or via one or more branch circuit breaker boxes  120 A- 120 N) in accordance with an electrical distribution plan for the facility implementing the power distribution system  100 . The electrical distribution plan for the facility may be prepared in whole or in part by an architect, a lighting designer, or other person adept at specifying electrical fixture types (e.g., types of lighting fixtures, ceiling fans, exhaust fans, heating fixtures, or other electrical fixtures) and corresponding locations within a facility in accordance with state, local, or other applicable electrical or energy codes or standards. 
     To comply with such codes or standards, each branch circuit  112 ,  114 ,  116 , and  118  may have a respective maximum power usage limit (e.g., 200 Amps or 24 KWatts for 120 VAC service). In this implementation, to comply with the maximum power usage limit for a branch circuit, each electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  planned for and installed in the respective branch circuit  112 ,  114 ,  116 , and  118  is assigned a corresponding power usage limit that is a fraction (e.g., 50 Watt, 75 Watt, or 90 Watt) of the maximum power usage limit of the respective branch circuit. As described in further detail below, each electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  in each branch circuit  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  has a respective label  122   a - 122   n ,  124   a - 124   c ,  126   a - 126   c , or  128   a - 128   n  that is adapted to be modified to enable the electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  to comply to its assigned power usage limit upon installation in the respective branch circuit  112 ,  114 ,  116 , or  118 . Accordingly, electrical fixture assemblies consistent with the present invention enable manufacturers (e.g., lighting manufacturers) to produce an electrical fixture  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  adapted to be modified upon installation to comply with various assigned power usage limits and to avoid producing low volumes of special ordered labeled electrical fixtures each having a different maximum wattage or power usage limit. In addition, electrical fixture assemblies consistent with the present invention enable an architect, a lighting designer, or other person familiar with circuit loading to select the type and number of electrical fixture assemblies  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  for a respective branch circuit  112 ,  114 ,  116 , or  118  based on the assigned maximum power usage limit (e.g., 200 Amps or 24 KWatts for 120 VAC service) of the branch circuit, assign a corresponding power usage limit to each selected electrical fixture assembly in accordance with the assigned maximum power usage limit of the branch circuit  112 ,  114 ,  116 , or  118 , and then modify (or have modified) each label  122   a - 122   n ,  124   a - 124   c ,  126   a - 126   c , or  128   a - 128   n  to enable the respective electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  to comply to its assigned power usage limit upon installation in the respective branch circuit  112 ,  114 ,  116 , or  118 . 
     Each electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c , or  108   a - 108   n  may be a lighting fixture assembly (such as a track lighting fixture assembly  204 ,  206 , or  208  in a track lighting system  200  in  FIG. 2A  or a recessed lighting fixture assembly  250  in  FIG. 2B ), a ceiling fan fixture assembly  260 , or other electrical fixture that has an interchangeable element (e.g., a lamp, trim, fan blade, or heating element) that may impact the power usage of the electrical fixture. As shown in  FIG. 2A , a track lighting fixture system  200  consistent with the present invention has a track terminal  202  and one or more track lighting fixture assemblies  204 ,  206 , and  208  each of which may include a track head and trim (neither of which is shown in the figures). Each track lighting fixture assembly has a label  210 ,  212 , or  214  adapted to be modified to enable the track lighting fixture assembly  204 ,  206 , and  208  to comply to its assigned power usage limit upon installation in the respective branch circuit  112 ,  114 ,  116 , or  118 . In  FIG. 2A , each label  210 ,  212 , or  214  is shown disposed on an internal surface  216 ,  218 , or  220  (in cut-away view) of the respective track lighting fixture assembly  204 ,  206 , and  208 . The internal surface  216 ,  218 , or  220  may be viewed by a user through an open end  222 ,  224 , or  226  of the respective track lighting fixture assembly  204 ,  206 , and  208  so that a user may reference the label  210 ,  212 , or  214  as modified by an installer to identify an interchangeable element (e.g., a lamp or trim) in compliance with the power usage limit assigned to the respective fixture assembly  204 ,  206 , and  208  in accordance with the present invention. However, the label  210 ,  212 , or  214  may also be disposed on an external surface  228 ,  230 , or  232  of the respective track lighting fixture assembly  204 ,  206 , and  208 . In another embodiment, a label  240  may be disposed on the track terminal  202  so that a user may reference the label  240  as modified by an installer to identify an interchangeable element (e.g., a lamp or trim) in compliance with the power usage limit assigned to each fixture assembly  204 ,  206 , and  208  in the track system  200 . 
     Similarly, as shown in  FIGS. 2B and 2C , a recessed lighting fixture assembly  250 , a ceiling fan fixture assembly  260 , or other electrical fixture assembly consistent with the present invention includes a label  252  or  262  adapted to be modified to enable the respective fixture  250  or  260  to comply to its assigned power usage limit upon installation in the respective branch circuit  112 ,  114 ,  116 , or  118 . Each label  252  or  262  may be disposed on an internal surface  254  or  264  visible through an open end  256  or  266  of the respective fixture assembly  250  or  260 , or on an external surface  258  or  268  of the respective fixture assembly  250  or  260  so that a user may reference the label  252  or  262  to identify an interchangeable element (e.g., a lamp, trim, fan blade, or heating element) in compliance with the power usage limit assigned to the fixture assembly  250  or  260  in accordance with the present invention. 
       FIG. 3  depicts one embodiment  300  of the modifiable label  122   a - 122   n ,  124   a - 124   c ,  126   a - 126   c ,  128   a - 128   n ,  210 ,  212 ,  214 ,  252 , or  262  suitable for use with each of the electrical fixture assemblies  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  in the electrical power distribution system  100 . The label  300  is adapted to be applied to a surface  216 ,  218 ,  220 ,  228 ,  230 ,  232 ,  240 ,  254 ,  258 ,  264 , or  268  of the electrical fixture assembly. The label  300  has a plurality of sections  302 ,  304 , and  306  where each section  302 ,  304 , and  306  identifies a respective one of a plurality of power usage limits  308 ,  310 , and  312  (e.g., 50 Watt, 75 Watt, or 90 Watt) for operating the electrical fixture in a circuit, such as in a branch circuit  112 ,  114 ,  116 , or  118  of an electrical power distribution circuit  100 . At least one of the sections (e.g., section  304  or  306  or both) is adapted to be removed from the label  300  by an installer when the power usage limit identified by the respective section exceeds another power usage limit associated with or assigned to the electrical fixture  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  when installed in the circuit  112 ,  114 ,  116 , or  118 . 
     In the implementation shown in  FIG. 3 , each of the sections  302 ,  304 , and  306  correspond to a respective layer of the label  300  disposed in an order or sequence in accordance with the power usage limit  308 ,  310 , or  312  identified by each layer  302 ,  304 , and  306 . Each layer  302 ,  304 , and  306  are formed such that the power usage limit  308 ,  310 , or  312  identified by each layer  302 ,  304 , and  306  is visible to a user viewing the label  300 . In this implementation, a first  302  of the sections is adapted to be disposed on, printed on or applied to the surface  216 ,  218 ,  220 ,  228 ,  230 ,  232 ,  254 ,  258 ,  264 , or  268  of the electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260 . A second layer  304  is disposed over or removably affixed to a portion of the first layer  302 . A third layer  306  may be disposed over or removably affixed to a portion of the second layer  304 . Thus, each layer  304  and  306  of the label  300 , except for the first or lowest layer  302 , is adapted to be removed from the label  300  when the power usage limit identified by the respective section exceeds the power usage limit assigned to the electrical fixture  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  when installed in the circuit  112 ,  114 ,  116 , or  118 . In the example implementation shown in  FIG. 3 , if the label  300  is applied to an electrical fixture assembly (e.g.,  102   a ) having an assigned power usage limit of 50 Watts when installed in a circuit (e.g., branch circuit  112 ), then an installer or user may reference the label  300  and remove each layer  304  and  306  identifying a respective power usage limit  310  or  312  (e.g., 75 Watt and 90 Watt, respectively) that exceeds the assigned power usage limit of 50 Watts. Thus, the label  300 , when applied to an electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  enables the electrical fixture assembly to comply with different power usage limits that may be assigned to the electrical fixture upon installation in a branch circuit  112 ,  114 ,  116 , or  118  in accordance with state, local, or other applicable electrical or energy codes. 
     Returning to  FIG. 3 , each section or layer  302 ,  304 , and  306  may also identify an interchangeable element  314 ,  316 , and  318  (e.g., a lamp, trim, fan blade, or heating element) in association with the power usage limit  308 ,  310 , or  312  identified by the respective section or layer  302 ,  304 , or  306  to reflect that the interchangeable element  314 ,  316 , and  318  is adapted to be used with an electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  when the interchangeable element  314 ,  316 , and  318  is operated in the electrical fixture in accordance with the power usage limit  308 ,  310 , or  312  identified by the respective section or layer  302 ,  304 , or  306 . 
     In the implementation depicted in  FIG. 3 , the label  300  is suitable for use with a lighting fixture assembly  200  or  250 . Each section layer  302 ,  304 , and  306  of the label  300  identifies a respective lamp selection as the interchangeable element  314 ,  316 , or  318  capable of being operated in the lighting fixture assembly  200  or  250  in accordance with the power usage limit  308 ,  310 , or  312  identified by the respective section or layer  302 ,  304 , and  306 . Each lamp selection  314 ,  316 , or  318  includes a lamp type  320 ,  322 , or  324  and a corresponding power limit or wattage  326 ,  328 , or  330 . 
     The first section or layer  302  may also identify the first lamp selection or interchangeable element  314  in association with a trim type  332  to reflect that the trim type  332  is adapted to mate to and be used with the lighting fixture to which the label  300  is applied, when the first lamp selection  314  is operated in the lighting fixture in accordance with the power usage limit  308  identified by the first section or layer  302 . In addition, the label  300  may be arranged such that the second section or layer  304  identifies the second lamp selection or interchangeable element  316  in association with the same trim type  332  to reflect that the trim type  332  is also adapted to mate to and be used with the lighting fixture when the second lamp selection  316  is operated in the lighting fixture in accordance with the power usage limit  310  identified by the second section or layer  304 . Similarly, the third section or layer  306  may be disposed relative to the first layer  302  such that the third layer  302  identifies the third lamp selection or interchangeable element  318  in association with the same trim type  332  to reflect that the trim type  332  is also adapted to mate to and be used with the lighting fixture when the third lamp selection  318  is operated in the lighting fixture in accordance with the power usage limit  312  identified by the third layer  306 . 
     Accordingly, each layer  302 ,  304 , and  306  may identify respective lamp selection  314 ,  316 ,  318  and trim type  332  combinations for use with a light fixture assigned a power usage limit that is equal to or lower than the power usage limit  308 ,  310 , or  312  identified by the respective layer  302 ,  304 , and  306  of the label  300 . 
     To assist in removal of a section  304  or  306  from the label  300 , a bottom edge  370  or  372  of each of the removable sections  304  or  306  may be color coded and/or omit an adhesive backing to assist in the start of the removal process for the respective section  304  or  306  of the label  300 . 
       FIG. 4  depicts another embodiment  400  of the modifiable label  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  210 ,  212 ,  214 ,  204 ,  206 ,  208 ,  250 , or  260  suitable for use with each of the electrical fixture assemblies  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  in the electrical power distribution system  100 . The label  400  is adapted to be applied to a surface  216 ,  218 ,  220 ,  228 ,  230 ,  232 ,  254 ,  258 ,  264 , or  268  of the electrical fixture assembly. The label  400  has a plurality of sections  402 ,  404 , and  406  where each section  402 ,  404 , and  406  identifies a respective one of a plurality of power usage limits  408 ,  410 , and  412  (e.g., 50 Watt, 75 Watt, or 90 Watt) for operating the electrical fixture in a circuit, such as in a branch circuit  112 ,  114 ,  116 , or  118  of an electrical power distribution circuit  100 . At least one of the sections (e.g., section  404  or  406  or both) is adapted to be removed from the label  400  when the power usage limit identified by the respective section exceeds another power usage limit associated with or assigned to the electrical fixture  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  when installed in the circuit  112 ,  114 ,  116 , or  118 . 
     As shown in  FIG. 4 , the sections  402 ,  404 , and  406  of the label  400  are disposed in an order or sequence in accordance with the power usage limit  408 ,  410 , or  412  identified by each section  402 ,  404 , and  406 . In one implementation, the power usage limit  408  identified by a first  402  of the sections is lower than the power usage limit  410  identified by a second section  404  adjacent the first section  402 . Similarly, the power usage limit  410  identified by the second section  404  is lower than the power usage limit  412  of a next section  406  adjacent the second section  404 . Each section  404  and  406  may be detachable from the adjacent preceding section  402  or  404  via perforations or creases formed between sections  402 ,  404 , and  406  as reflected by the dashed lines  405  and  407  in  FIG. 4 . 
     At least the first section  402  is adapted to be disposed on or applied to the surface  216 ,  218 ,  220 ,  228 ,  230 ,  232 ,  254 ,  258 ,  264 , or  268  of the electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  such that each section  404  and  406  of the label  400 , except for the first section  402 , is adapted to be removed from the label  400  by an installer when the power usage limit identified by the respective section exceeds the power usage limit assigned to the electrical fixture  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  204 ,  206 ,  208 ,  250 , or  260  when installed in the circuit  112 ,  114 ,  116 , or  118 . 
     Each section  402 ,  404 , and  406  may also identify an interchangeable element  414 ,  416 , and  418  (e.g., a lamp, trim, fan blade, or heating element) in association with the power usage limit  408 ,  410 , or  412  identified by the respective section  402 ,  404 , or  406  to reflect that the interchangeable element  414 ,  416 , and  418  is adapted to be used with an electrical fixture assembly  102   a - 102   n ,  104   a - 104   c ,  106   a - 106   c ,  108   a - 108   n ,  200 ,  252 , or  262  when the interchangeable element  414 ,  416 , and  418  is operated in the electrical fixture in accordance with the power usage limit  408 ,  410 , or  412  identified by the respective section  402 ,  404 , or  406 . 
     Similar to the label  300  in  FIG. 3 , the label  400  depicted in  FIG. 4  is suitable for use with a lighting fixture assembly  200  or  250 . Each section  402 ,  404 , and  406  of the label  400  identifies a respective lamp selection as the interchangeable element  414 ,  416 , or  418  capable of being operated in the lighting fixture assembly  200  or  250  in accordance with the power usage limit  408 ,  410 , or  412  identified by the respective section  402 ,  404 , and  406 . Each lamp selection  414 ,  416 , or  418  includes a lamp type  420 ,  422 , or  424  and a corresponding power limit or wattage  426 ,  428 , or  430 . 
     In one implementation, the first section  402  also identifies the first lamp selection or interchangeable element  414  in association with a trim type  432  to reflect that the trim type  432  is adapted to mate to and be used with the lighting fixture to which the label  400  is applied, when the first lamp selection  414  is operated in the lighting fixture in accordance with the power usage limit  408  identified by the first section  402 . In addition, the label  400  may be arranged such that the second section  404  identifies the second lamp selection or interchangeable element  416  in association with the same trim type  432  to reflect that the trim type  432  is also adapted to mate to and be used with the lighting fixture when the second lamp selection  416  is operated in the lighting fixture in accordance with the power usage limit  410  identified by the second section  404 . Similarly, the third section  406  may be disposed relative to the first section  402  such that the third section  406  identifies the third lamp selection or interchangeable element  418  in association with the same trim type  432  to reflect that the trim type  432  is also adapted to mate to and be used with the lighting fixture when the third lamp selection  418  is operated in the lighting fixture in accordance with the power usage limit  412  identified by the third section  406 . 
     Accordingly, each section  402 ,  404 , and  406  of the label  400  may identify respective lamp selection  414 ,  416 ,  418  and trim type  432  combinations for use with a light fixture assigned a power usage limit that is equal to or lower than the power usage limit  408 ,  410 , or  412  identified by the respective sections  402 ,  404 , and  406  of the label  400 . 
     To assist in removal of a section  404  or  406  from the label, a bottom edge  470  and  472  of each of the removable sections  404  or  406  may be color coded and/or omit an adhesive backing to assist in the start of the removal process for the respective section  404  or  406  of the label  400 . 
       FIG. 5  depicts a process or method  500  for designing a load for a circuit (e.g., branch circuit  112 ) using electrical fixtures adapted to be modified to comply with a respective power usage limit (e.g.,  102   a ) and for modifying the electrical fixture to comply with the power usage limit assigned to the electrical fixture for operation in the circuit. Initially, an architect, designer, or user identifies a branch circuit load limit for an area (step  502 ). For example, a lighting designer for a commercial building may identify that the branch circuit  112  is to provide power for track lighting in a specific room of the commercial building. The designer is able to request or recognizes that the branch circuit  112  has a load limit of, for example, 70 Amps (or 8.4 Kilowatts assuming 120 VAC service) for powering the track lighting fixture or assemblies to be operated in the branch circuit  112 . The designer then selects one or more electrical fixtures or assemblies  102   a - 102   n  for installation in the branch circuit  112  based on the identified branch circuit load limit (step  504 ). To comply with applicable electrical codes and/or energy codes, the designer assigns each electrical fixture or assembly  102   a - 102   n  with a respective power usage limit based on the identified branch circuit load limit (step  506 ). For example, assuming the designer wanted to utilize  168  track lighting fixture assemblies  204 ,  206 , and  208 , the designer assigns each of the track lighting fixture assemblies  204 ,  206 , and  208  to be installed in the branch circuit  112  a power usage limit of 50 Watts (i.e., 8.4 Kilowatts/168=50 Watts). 
     Subsequently, an installer or user receives or identifies the power usage limit to be assigned to an electrical fixture or assembly  102   a  (step  508 ) to be installed in the branch circuit  112 . For example, the designer of the lighting in the commercial building having the branch circuit  112  may identify the planned track lighting fixture assemblies  102   a - 102   n  to be installed on the branch circuit  112  to the installer or user along with the corresponding power usage limit assigned to each lighting fixture assembly  102   a - 102   n  via a lighting layout plan or list (not shown in the figures). The installer or user then associates a label  300  or  400  with the electrical fixture  102   a , where the label  300  or  400  has a plurality of sections  302 ,  304 ,  306  or  402 ,  404 ,  406  and each section identifies a respective one of a plurality of power usage limits  308 ,  310 ,  312  or  408 ,  410 ,  412  for the electrical fixture  102   a  (step  510 ). The label  300  or  400  may be provided with the electrical fixture  102   a  or applied during manufacturing to a surface  216 ,  218 ,  220 ,  228 ,  230 ,  232 ,  254 ,  258 ,  264 , or  268  of the fixture  102   a  visible by the installer or user. Next, the installer or user removes from the label  300  or  400  each section identifying a respective one of the power usage limits  308 ,  310 ,  312  or  408 ,  410 ,  412  that exceeds the power usage limit assigned to the electrical fixture  102   a  (step  512 ). The installer or user may then identify on the label an interchangeable element  314 ,  316 ,  318 ,  332 ,  414 ,  416 ,  418 , or  432  (e.g., a lamp or a trim) identified by one of the sections not removed from the label  300  or  400  (step  514 ). Finally, the installer or user may install the identified interchangeable element  314 ,  316 ,  318 ,  332 ,  414 ,  416 ,  418 , or  432  in the electrical fixture (step  516 ). By performing process  500 , an installer or user may substantially increase the likelihood that an electrical inspector will approve of the installation of the electrical fixture without requiring a new label for the electrical fixture governing the interchangeable elements of the electrical fixture to the power usage level assigned to the fixture. 
     While various embodiments of the present invention have been described, it will be apparent to those of skill in the art that many more embodiments and implementations are possible that are within the scope of this invention. Accordingly, the present invention is not to be restricted except in light of the attached claims and their equivalents.