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 ›2026 NEC 250.20 to 250.36: which AC systems must be grounded, which conductor is grounded, ungrounded system marking, bonding jumpers and HRG systems.
Updated 2026-10-15 · Read the article ›2026 NEC 410.115 to 410.155: recessed luminaire temperature, 1/2 in. and 3 in. clearances, IC rating, 18 in. to 6 ft taps, and track supports.
Updated 2026-10-15 · Read the article ›2026 NEC 230.90, 230.91 and 230.95: where service overcurrent devices go, the two to six device rule, and which services need ground-fault protection.
Updated 2026-10-15 · Read the article ›2026 NEC 210.60 to 210.65: show window outlets every 6 ft, HVAC service receptacle within 25 ft, hotel guest rooms and meeting room floor outlets.
Updated 2026-10-15 · Read the article ›