Emergency Systems practice questions

Per 700.32(A), with which overcurrent protective devices must emergency system OCPDs be selectively coordinated?

1. A Only other OCPDs that are also part of the emergency system
2. B Only OCPDs rated above 100 amperes
3. C Only the OCPD immediately upstream
4. D All supply-side and load-side OCPDs

A contractor wants to install unit equipment using a flexible cord-and-plug connection instead of Chapter 3 wiring methods. Under what condition is this permitted?

1. A Never — unit equipment must always use a fixed Chapter 3 wiring method
2. B The cord does not exceed 900 mm (3 ft) in length
3. C The cord does not exceed 1.8 m (6 ft) in length
4. D Only if the unit equipment is installed in a corridor or means of egress

Under 700.12(C)(4), a storage battery system supplying emergency illumination must maintain the total load for at least how long without the voltage falling below 87.5% of nominal?

1. A 8 hours
2. B 1.5 hours
3. C 30 minutes
4. D 90 seconds

Under 700.10(D)(2), which of the following is an approved method to protect emergency feeder-circuit wiring from fire?

1. A Installing the cable in any raceway listed for general wiring
2. B Running the feeder in the same fire-rated assembly as normal (non-emergency) circuits
3. C Using a listed fire-resistive cable system with a minimum 1-hour rating
4. D Encasing the cable or raceway in a minimum of 50 mm (2 in.) of concrete

A designer is evaluating an emergency lighting layout. Per 700.16(B), what is the key design requirement for system reliability?

1. A Every luminaire must have its own dedicated battery pack regardless of unit equipment listing
2. B The system must be tested monthly by a licensed engineer
3. C The system must use at least two separate transfer switches
4. D Failure of any single illumination source cannot leave a required space in total darkness

Per 700.17, a branch circuit supplying emergency lighting must be arranged so that when normal lighting supply is interrupted, the circuit receives power from a source that complies with which section?

1. A 700.12
2. B 700.10
3. C 700.16
4. D 700.5

A designer proposes controlling an emergency lighting circuit with a 3-way switch at each end of a corridor for convenience. Is this permitted?

1. A No, but only in facilities covered by Articles 518 and 520
2. B No, 3- and 4-way switches are not permitted on emergency lighting circuits
3. C Yes, as long as one of the two switches is restricted to authorized persons
4. D Yes, because 3-way switches are single-throw switches connected in parallel

Per 700.10(B), which of the following is a permitted exception to keeping emergency wiring independent of all other wiring?

1. A Wiring supplied from two sources within exit or emergency luminaires
2. B Running emergency and normal branch circuits together in any dwelling unit panelboard
3. C Using the same disconnect enclosure for emergency and nonemergency feeders
4. D Sharing a raceway with normal power wiring anywhere in a commercial building

Per 700.5(A), which of the following is NOT permitted as transfer equipment for an emergency system?

1. A A meter-mounted transfer switch
2. B An automatic transfer switch listed and marked for emergency use
3. C Transfer equipment complying with Article 705 for parallel operation
4. D Transfer equipment designed to prevent interconnection of the normal and emergency sources

A single alternate power source is connected to feed emergency circuits, legally required standby circuits, and optional standby circuits, but its capacity is limited during peak demand. What does 700.4(B) require?

1. A The optional standby circuits must be permanently disconnected from the alternate source
2. B A completely separate alternate source must be installed for the optional standby circuits
3. C Automatic selective load pickup and load shedding to protect the priority order of the three load types
4. D The system must be resized so no load management is ever needed

Under 700.11(D), which installation is acceptable for emergency system wiring without additional exception?

1. A Conductors run in nonmetallic cable strapped directly to the structure
2. B Conductors run as open cable on bushed knockouts with no raceway
3. C Conductors run in armored cable
4. D Conductors bundled and taped to existing normal-power cable without a raceway

Class 2 emergency circuits are installed alongside nonemergency Class 2 circuits that are bundled. Per 700.11(C), what must be done?

1. A The Class 2 emergency circuits must be bundled separately from the nonemergency Class 2 circuits
2. B All the circuits may be bundled together since both are Class 2
3. C The Class 2 emergency circuits must be separated by a nonconductive sleeve or barrier
4. D The Class 2 emergency circuits must be run in a dedicated raceway with no other conductors

Under 700.10(D)(1), which of the following occupancies triggers the additional fire-protection requirements for emergency systems?

1. A An educational occupancy with 250 occupants
2. B An assembly occupancy with an occupant load of 1000 persons
3. C A building 20 m (65 ft) in height
4. D An assembly occupancy with an occupant load of 500 persons

An automatic load control relay is installed to energize an emergency lighting load upon loss of normal power. Per 700.26, which use of this relay is prohibited?

1. A Using the relay as transfer equipment
2. B Responding to loss of the normal supply
3. C Being a listed device
4. D Energizing the emergency lighting load automatically

An emergency generator's fuel is delivered by an electrically powered transfer pump. Per 700.12(C)(2), how must this pump be connected?

1. A To the emergency power system
2. B To the normal utility service, since the pump is not part of the emergency load
3. C To either normal or emergency power, at the installer's discretion
4. D To a separate dedicated standby generator just for the pump

A generator set takes 15 seconds to develop power after loss of normal supply. Per 700.12(D)(3), how is this permitted for an emergency system?

1. A A battery charger sized for continuous full building load must be installed instead
2. B It isn't; emergency generator sets can never take longer than 10 seconds to develop power
3. C An auxiliary power supply energizes the emergency system until the generator picks up the load
4. D A second generator set must run in parallel at all times as backup

An emergency system relies on a single on-site generator as its only alternate source. Under 700.3(F), what must generally be provided so the emergency system stays available while that generator is serviced?

1. A A second, identical generator installed solely as a spare in storage
2. B Temporary extension cords run through a service door to a rental generator
3. C A written maintenance schedule limiting service to overnight hours
4. D Permanent switching means to connect a portable or temporary alternate source of power

During parallel operation of an emergency source with the normal source, the emergency load capacity briefly falls below what is required. What must occur per 700.4(C)(1)?

1. A A system malfunction signal must initiate in accordance with 700.6(A)
2. B The emergency source must automatically disconnect from the normal source within 10 seconds
3. C The utility source must be shed to restore full emergency capacity
4. D The transfer switch must lock out until manually reset by qualified personnel

An emergency power system is supplied by a single feeder. Per 700.5(D), what must the system include to support maintenance of the transfer equipment without losing emergency power?

1. A An automatic load-shedding controller
2. B Redundant transfer equipment or a bypass isolation transfer switch
3. C A second, independent emergency source feeder
4. D A ground-fault protection relay on the transfer switch

A generator serving as an on-site emergency power source is connected at the service-entrance equipment of a commercial building. Which section requires a sign at that location identifying the type and location of the emergency source?

1. A 700.7(A)
2. B 700.6(A)
3. C 700.10(A)
4. D 700.5(A)

Under 700.6(D), a ground-fault signal is required for an emergency system that is:

1. A A solidly grounded wye system over 150 volts to ground with protective devices rated 1000 amperes or more
2. B An impedance-grounded system over 150 volts to ground with protective devices rated 1000 amperes or more
3. C A solidly grounded wye system of any voltage with protective devices rated 800 amperes or more
4. D Any emergency system rated 1000 amperes or more, regardless of grounding type

Under 700.12(C), what is the minimum duration an emergency power source must be capable of supplying the total load?

1. A 2 hours of system operation
2. B 1 hour of system operation
3. C 8 hours of system operation
4. D 4 hours of system operation

Under 700.3(A), who is responsible for conducting or witnessing commissioning of an emergency system?

1. A The authority having jurisdiction
2. B The system manufacturer's field technician
3. C The building owner's maintenance staff
4. D The installing electrical contractor alone

An exposed Class 2 emergency lighting circuit is run in cable tray across a mechanical room. Per 700.11(B), what is the maximum spacing allowed between permanent identification markings along the run?

1. A 25 ft (7.6 m)
2. B 3 ft (900 mm)
3. C 10 ft (3 m)
4. D 50 ft (15 m)

A luminaire reaches its required emergency illumination level by responding to an external control input upon loss of normal power. Per 700.24, what is required of this luminaire?

1. A It must be listed only if installed in a healthcare occupancy
2. B It must be connected directly to the normal power source with no control input
3. C It must be listed for use in emergency systems
4. D It must be exempt from listing because it uses a control input rather than direct power loss

A high-rise office building is 90 ft (27 m) tall. Per 700.12(B), where must the emergency power source equipment be located?

1. A In any mechanical room that is kept locked to prevent unauthorized access
2. B On the roof, away from any occupied floors
3. C In a space with a 1-hour fire rating, since the building is under 100 ft
4. D In a space fully protected by an approved automatic fire protection system, or a space with a 2-hour fire rating

Per 700.12, within what maximum time must emergency lighting or power be available after failure of the normal supply?

1. A 60 seconds
2. B 10 seconds
3. C 3 seconds
4. D 30 seconds