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DOE-HDBK-1092-98
5. The disconnect shall not be provided with a means of being operated from a remote location.
6. A circuit breaker disconnecting means shall not be opened automatically by a fire alarm
system, except as allowed by NEC Section 620-51(b).
7. The within-sight rule applies to all elevator equipment disconnects. Specific locations are
given for elevators with or without field control.
8. The disconnecting means shall be installed in a location that is readily accessible to only
qualified persons.
When power from more than one source is used for single- or multiple-car installations, a separate
disconnect should be provided for each source. These disconnects should be in sight of the equipment
supplied, and warning signs should be placed on or adjacent to the disconnect to read. For example,
"Warning: Parts of the control panel are not deenergized by this switch."
Lighting circuits for each elevator require a disconnect switch in the equipment room labeled for the
car it serves and lockable in the open position.
6.3.2.4 MOTORS
Elevator and escalator motors are considered as intermittent duty. This allows them to be protected
by the overcurrent protection device supplying the power for the branch circuit, which is selected by
the percentages in NEC Table 430-22(a) times the full load current of the motors. For example: What
is the load for a 15-minute rated 40-hp, 460-V, three-phase motor used as a freight elevator motor?
Step 1:
Finding full load current--NEC
Table 430-150
40 HP = 52 A
Step 2:
Finding demand factors--
NEC Table 430-22(a)
15 minute rated = 85%
Step 3:
Calculating load
52 A x 85% = 44.2 A
Answer: Load is 44.2 amps.
6.3.2.5 GROUNDING
All metal raceways and cables, Types MC, MI, or AC, shall be bonded to the metal frame of the car.
All elevator equipment including metal enclosures for electric devices on the car shall be grounded
in accordance with NEC Article 250.
6-10


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