Electrical Wiring Residential
Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
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Chapter 28, Problem 1R

What is the minimum size service for a one-family dwelling? ____________________

Expert Solution & Answer
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To determine

Find the minimum rating of service size for a one-family dwelling.

Answer to Problem 1R

The minimum rating of service size for a one-family dwelling is 100amperes.

Explanation of Solution

Discussion:

The National Electrical Code committee develops NEC – the standard electrical code, and the main objective for the origin of the code is to protect and safeguard people and elements from electrical hazards. The codes that explain the rating of service disconnecting means are defined in an article NEC 230.79.

According to an article NEC 230.79 (C), for a one-family dwelling, the rating of the service disconnecting means should not be less than 100amperes, 3-wire.

Conclusion:

Thus, the minimum rating of service size for a one-family dwelling is 100amperes.

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