Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 29, Problem 5R
What demand factor may be applied when four or more fixed appliances are connected to a service, in addition to an electric range, air conditioner, clothes dryer, or space-heating equipment? (220.53) ____
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- Loads, Service, and Overcurrent Protection
6.a. The general lighting load is based on a _______ per square foot basis.A. kilowattB. number of circuitsC. volt-ampereD. general illumination6.b. What's the primary disadvantage of using copper conductors?A. AvailabilityB. WeightC. CostD. Durability
4.a. The ___ calculated load is rarely placed on an electrical system.A. optionalB. standardC. total
4.b. What's the primary disadvantage of using copper conductors?A. CostB. AvailabilityC. Weight
4.c. You're evaluating the components of a multioccupancy building that won't have an on-site employee. Tobe compliant with the NEC, each occupant will need to have access to their ownA. service-disconnecting means.B. service conductor.C. cable attachment point.D. emergency fire water-pump disconnect.
A double-oven electric range is rated at 18 kW, 120/240 volts. Calculate the maximum demand according to Table 220.55. Show all calculations.
For the range discussed in problem 1:
What size 60°C ungrounded conductors are required?
What size 60°C neutral conductor is required?
What size 75°C ungrounded conductors are required? The terminal block and lugs on the range, the branch-circuit breaker, and the panelboard are marked as suitable for 75°C wire.
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Chapter 29 Solutions
Electrical Wiring Residential
Ch. 29 - Prob. 1RCh. 29 - a. What is the unit load per ft2 for the general...Ch. 29 - a. What is the ampere rating of the circuits that...Ch. 29 - Why is the air-conditioning load for this...Ch. 29 - What demand factor may be applied when four or...Ch. 29 - What load may be used for an electric range rated...Ch. 29 - What is the calculated load for an electric range...Ch. 29 - What is the calculated load when fixed electric...Ch. 29 - On what basis is the neutral conductor of a...Ch. 29 - Why is it permissible to omit an electric space...
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