Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-40507 - Sections C405.6 and C405.7-Electrical energy consumption

Current through Register Vol. 24-14, July 15, 2024
C405.6
Electrical
			 transformers.
Low-voltage dry-type distribution electric transformers
			 shall meet the minimum efficiency requirements of Table C405.6 as tested and
			 rated in accordance with the test procedure listed in DOE
			  10 C.F.R.
			 431 . The efficiency shall be verified through
			 certification under an approved certification program or, where no
			 certification program exists, the equipment efficiency ratings shall be
			 supported by data furnished by the transformer manufacturer.
EXCEPTION:
The following transformers are exempt:
1. Transformers that meet the Energy Policy Act of 2005
						  exclusions based on the DOE  10 C.F.R. 431  definition of
						  special purpose applications.
2. Transformers that meet the Energy Policy Act of 2005
						  exclusions that are not to be used in general purpose applications based on
						  information provided in DOE  10 C.F.R. 431.
3. Transformers that meet the Energy Policy Act of 2005
						  exclusions with multiple voltage taps where the highest tap is not less than 20
						  percent more than the lowest tap.
4. Drive transformers.
5. Rectifier transformers.
6. Auto-transformers.
7. Uninterruptible power system transformers.
8. Impedance transformers.
9. Regulating transformers.
10. Sealed and nonventilating transformers.
11. Machine tool transformer.
12. Welding transformer.
13. Grounding transformer.
14. Testing transformer.
Table C405.6
Minimum Nominal Efficiency Levels For
				 10 C.F.R.
				431  Low Voltage Dry-Type Distribution
				Transformers
Single Phase
						  Transformers
Three Phase
						  Transformers
kVAa
Efficiency
						  (%)b
kVAa
Efficiency
						  (%)b
15
97.70
15
97.89
25
98.00
30
98.23
37.5
98.20
45
98.40
50
98.30
75
98.60
75
98.50
112.5
98.74
100
98.60
150
98.83
167
98.70
225
98.94
250
98.80
300
99.02
333
98.90
500
99.14
750
99.23
1000
99.28
a kiloVolt-Amp rating.
b Nominal efficiencies shall be
				established in accordance with the DOE
				 10 C.F.R.
				431  test procedure for low voltage dry-type
				transformers.
C405.7
Dwelling unit electrical energy consumption.
Each dwelling unit
			 located in a Group R-2 building shall have a separate electrical meter. A
			 utility tenant meter meets this requirement. See Section C409 for additional
			 requirements for energy metering and energy consumption management.
EXCEPTION:
Dwelling units in other than Group R-2 multi-family and
						  live/work units are not required to provide a separate electrical metering at
						  each dwelling unit where electrical usage is metered separately for each of the
						  following building end uses:
1. Dwelling units.
2. Sleeping units.
3. Commercial kitchens.
4. Central laundries.
C405.7.1
Electric receptacles at dwelling unit gas appliances.
Where
			 dwelling unit appliances are served by natural gas, an electrical receptacle or
			 junction box and circuit shall be provided at each gas appliance with
			 sufficient capacity to serve a future electric appliance in the same location.
			 The receptacles and circuits shall be included in the electrical service load
			 calculation and shall meet the requirements of items 1 through 3 below. The
			 receptacle or junction box for each gas appliance shall be located within 12
			 inches of the appliance and without obstructions between the appliance and the
			 outlet. An electric receptacle is not required for a decorative gas fireplace.
1. Each gas range, cooktop, or oven, or
			 combination appliance, location shall be served by a dedicated 240/208-volt,
			 40-amp receptacle connected to the dwelling unit electric panel with a
			 3-conductor
2. Each gas clothes
			 dryer location shall be served by a dedicated 240/208-volt, 30-amp receptacle
			 connected to the
dwelling unit
electric panel with a
			 3-conductor branch circuit and a minimum included load of 5000 VA.
3. The location of each gas domestic water
			 heater installed within a
dwelling unit
shall be served by a
			 dedicated 240/208-volt, 30-amp junction box connected to the
dwelling
			 unit
electrical panel with a 3-conductor branch circuit and a minimum
			 included load of 4500 VA.