page_title: Electrical wiring
section_title: Electrical panels
hierarchical_section_title: Electrical wiring / Electrical panels
caption_attribution_description: Electrical panels, cables and firestops in an electrical service room at St. Mary's Pulp and Paper, a paper mill in Sault Ste. Marie, Ontario, Canada.
context_page_description: Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure.
  Wiring is subject to safety standards for design and installation. Allowable wire and cable types and sizes are specified according to the circuit operating voltage and electric current capability, with further restrictions on the environmental conditions, such as ambient temperature range, moisture levels, and exposure to sunlight and chemicals.
  Associated circuit protection, control and distribution devices within a building's wiring system are subject to voltage, current and functional specification. Wiring safety codes vary by locality, country or region. The International Electrotechnical Commission is attempting to harmonise wiring standards amongst member countries, but significant variations in design and installation requirements still exist.
context_section_description: Electrical panels are easily accessible junction boxes used to reroute and switch electrical services.  The term is often used to refer to circuit breaker panels or fuseboxes.  Local codes can specify physical clearance around the panels.
caption: Electrical panels, cables and firestops in an electrical service room at a paper mill in Ontario, Canada
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