ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 32, Problem 11R
The NEC requires that a ____________ means be provided for standby power systems. In the case of portable gen sets, this might be as simple as pulling out the plug on the extension cord that is plugged into the receptacle on the gen set. For permanently installed standby power generators, this might be on the gen set and/or separately provided inside or outside of the home.
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A three-phase transmission line supplies power to three loads at a voltage
408 Vrms (line to line). The loads are as follows:
Load 1:
S₁ = 100+ j50 VA
Load 2:
S₂ = 40-j20 VA
Load 3:
S3 = 10 + j0 VA
Find the magnitude of the line current | Line and the combined power factor of
the loads.
Hint:
Steral \= √3 | Vime |× | Ime |
line
line
Can you show why the answer to this question R = 199 ohm?
Chapter 32 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
Ch. 32 - Prob. 1RCh. 32 - Where would the logical location be for running a...Ch. 32 - Prob. 3RCh. 32 - Prob. 4RCh. 32 - Prob. 5RCh. 32 - Is it permitted to ground the neutral conductor of...Ch. 32 - Briefly explain the function of a transfer switch....Ch. 32 - When a transfer switch transfers to standby power,...Ch. 32 - A typical transfer switch for residential...Ch. 32 - Prob. 10R
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