Flashcard · Electrical Services, Service Equipment, and Separately Derived Systems
Where are service conductor sizing and service disconnect rules?
Article 230, with Article 250 for grounding and bonding.
Article 230
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- Where are service conductor sizing and service disconnect rules?
- Article 230, with Article 250 for grounding and bonding.Article 230
- Minimum size of a one-family dwelling service disconnect?
- 100 A, 3-wire.NEC 2026 230.79
- Maximum number of service disconnects in one enclosure group?
- Six disconnects per service location, grouped together.NEC 2026 230.71
- What is the standard method for a dwelling general lighting load?
- 3 VA per square foot of floor area, with the demand tiers applied to the subtotal.NEC 2026 Article 120
- Dwelling lighting demand tiers?
- First 3,000 VA at 100%, 3,001 to 120,000 VA at 35%, over 120,000 VA at 25%.NEC 2026 Article 120
- Subtotal of 14,000 VA. Lighting demand?
- 3,000 + (11,000 x 0.35) = 6,850 VA.NEC 2026 Article 120
- Small-appliance and laundry loads in a dwelling?
- 1,500 VA for each of two small-appliance circuits and 1,500 VA for the laundry circuit.NEC 2026 Article 120
- Fastened-in-place appliance demand in a dwelling?
- 75% of the nameplate total when four or more are on the service or feeder, not counting ranges, dryers, heating or air conditioning.NEC 2026 Article 120
- Electric dryer load in a dwelling?
- 5,000 VA or the nameplate rating, whichever is larger, then demand factors as the section allows.NEC 2026 Article 120
- Which table sizes the grounding electrode conductor?
- Table 250.66, from the size of the largest ungrounded service conductor or equivalent area.NEC 2026 250.66
- Ground rod GEC need not exceed what size?
- 6 AWG copper when it is the sole connection to rod electrodes.NEC 2026 250.66(A)
- Concrete-encased electrode GEC need not exceed what size?
- 4 AWG copper when it is the sole connection to that electrode.NEC 2026 250.66