2026 NEC 440.60 to 440.65 room air conditioners: branch-circuit 80 and 50 percent limits, plug as disconnect, cord length, and leakage-current detection.
Updated 2026-10-15 · Read the article ›2026 NEC 310.10(G) parallel conductors: 1/0 AWG minimum, what each set must match, ampacity adjustment, and 240.4 sizing above and below 800 A.
Updated 2026-10-15 · Read the article ›2026 NEC 250.146 and 250.148: bonding receptacles to boxes, self-grounding devices, isolated ground, EGC splices, and two-prong replacement options.
Updated 2026-10-15 · Read the article ›2026 NEC 250.110 to 250.119: when fixed and cord-connected equipment must be grounded, double-insulated tools, and green, bare and reidentified EGCs.
Updated 2026-10-15 · Read the article ›2026 NEC Article 240 fuses and breakers: plug fuse limits, Edison base and Type S, cartridge fuses, interrupting ratings, slash ratings and series ratings.
Updated 2026-10-15 · Read the article ›2026 NEC Article 230 underground service and service-entrance conductors: minimum size, one set per service, approved wiring methods, protection and support.
Updated 2026-10-15 · Read the article ›2026 NEC 210.4 multiwire branch circuits: shared neutral current math, simultaneous disconnect, handle ties, line-to-neutral loads and grouping.
Updated 2026-10-15 · Read the article ›2026 NEC 680.40 to 680.54: spa emergency switch, outdoor and indoor hot tub rules, receptacle and luminaire distances, GFCI, and fountains.
Updated 2026-10-15 · Read the article ›2026 NEC 230.9, 230.24 and 230.26 to 230.29: clearances over roofs and grade, distance from windows, point of attachment height, service masts and drip loops.
Updated 2026-10-15 · Read the article ›2026 NEC 300.13, 300.22, 300.23 and 300.25: support above suspended ceilings, induced currents, firestopping, and wiring in ducts and plenums.
Updated 2026-10-15 · Read the article ›