ELECTRICAL WIRING:RESIDENTAL-6 PLANS
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 30, Problem 13R

(a)

To determine

Mention whether the statement “receptacles installed from the edge of hot tub or spa should be within 5 ft” is true or false.

(b)

To determine

Mention whether the statement “receptacles installed within 10 ft (3 m) from the hot tub or spa should be protected by GFCI” is true or false.

(c)

To determine

Mention whether the statement “receptacles providing power to the equipment of pool should be GFCI protected” is true or false.

(d)

To determine

Mention whether the statement “wall switches should be installed within 5 ft (1.5 m) from the swimming pool” is true or false.

(e)

To determine

Mention whether the statement “luminaires installed above a spa should be less at least 7 ft 6 in. when the circuit is GFCI protected” is true or false.

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A 3-phase, 4-wire distributor supplies a balanced voltage of 400/230 V to a load consisting of 50 A at p.f. 0-866 lagging for R-phase, 30 A at p.f. 0-866 leading for Y phase and 30 A at unity pf. for B phase. The resistance of each line conductor is 0-2 Q. The area of X-section of neutral is half of any line conductor: Calculate the supply end voltage for R phase. The phase sequence is RYB.
- A 3-phase, 4-wire distributor supplies a balanced voltage of 400/230 V to a load consisting of 8 A at p.f. 0.7 lagging for R-phase, 10 A at p.f. 0-8 leading for Y phase and 12 A at unity p.f. for B phase. The resistance of each line conductor is 0.4 2. The reactance of neutral is 0.2 2. Calculate the neutral current, the supply voltage for R phase and draw the phasor diagram. The phase sequence is RYB.
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