Safety Switches and Disconnects - CEU
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1
This enclosure type is intended for indoor or outdoor use, where corrosion resistance is required and is constructed of stainless steel, polymeric, or fiberglass.
NEMA Type 1
NEMA Type 3R
NEMA Type 4X
NEMA Type 12
2
A switching device is an electrical device that provides a safe means to open and close a circuit.
True
False
3
The National Electrical Code (NEC) requires that all hot tub and spa pumps be protected by a ground fault interrupter and a disconnect switch mounted within ____ feet of the hot tub or spa.
10
15
20
30
4
A safety switch can be open style without an enclosure.
True
False
5
_________ rotary disconnects are most often sold to original equipment manufacturer (OEM) customers, who then install the switches into their own control panels.
Enclosed
Fused
Non-fused
Open
6
A switch with no fuses is referred to as a ____________ safety switch.
Fusible
Fused
Overcurrent
Non-fusible
7
This device is used in applications where users need local circuit protection, for example next to a conveyor belt.
Hot tub panel
Bolted pressure switch
Open rotary disconnect
Enclosed circuit breaker
8
A double throw safety switch is used to manually switch from one load circuit to another.
True
False
9
The three main types of air conditioning disconnects are fused, non-fused and ______.
Molded case switch
Contactor
Rotary protector
Molded case circuit breaker
10
This type of disconnect is used for: Residential service entrance, Outdoor shut-off for residential air conditioning unit, Temporary service at a construction site, Outbuilding sub-feed.
General Duty
Heavy Duty
High Duty
Low Duty
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