Free Emergency & Standby Systems (Art. 700-702) Practice Questions

1. A building has both Article 700 emergency loads and Article 701 legally required standby loads. The transfer switches for these two systems:

• Must be separate so that failure of the standby system does not affect the emergency system
• Can share a single automatic transfer switch to save cost
• Must both transfer within 10 seconds
• Are permitted to share a common raceway

2. Ground-fault protection of equipment is required on emergency system feeders per NEC 700.26 with what special provision?

• It must alarm only and not automatically disconnect the emergency feeder
• It must trip the emergency feeder immediately on any ground fault
• It is not required on emergency systems under any circumstances
• It must be set to trip at a 30 mA threshold like GFCI

3. Per NEC 700.10(D), which of the following is an acceptable alternative to a 2-hour fire-rated enclosure for protecting emergency circuit wiring?

• Listed electrical circuit protective system with a minimum 2-hour fire rating
• Schedule 40 PVC conduit
• Standard metallic raceway with fire caulking at penetrations only
• Armored cable (Type AC) without additional fire protection

4. When sizing an emergency generator for a building, the generator must be sized to handle which loads simultaneously?

• All emergency loads (Art. 700) plus all legally required standby loads (Art. 701) if both are served by the same generator
• Only the single largest emergency load
• Emergency loads only; standby loads are always on a separate generator
• All building loads including normal power

5. Per NEC 700.10(D), wiring for emergency circuits must be kept entirely independent of all other wiring and equipment UNLESS:

• Wiring is in listed transfer equipment or dual-fed emergency/normal switchgear
• Conductors share the same raceway but are different colors
• The installation is in a residential occupancy
• An engineer stamps the plans approving shared raceways