Electrician Red Seal · Question
An electrician is installing aluminum conductor service entrance cable (SEC) to a single-family dwelling. For a 100 A service, what is the minimum size of aluminum conductor permitted for the ungrounded conductors, assuming 75°C termination ratings?
According to CEC Rule 4-004(1)(a)(iv) along with Table 2 (and footnote 1 for dwelling unit services), for a 100 A service with 75°C rated aluminum conductors, a
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Question: An electrician is installing aluminum conductor service entrance cable (SEC) to a single-family dwelling. For a 100 A service, what is the minimum size of aluminum conductor permitted for the ungrounded conductors, assuming 75°C termination ratings?
Answer options: ✅ No. 4 AWG
- No. 2 AWG
- No. 1 AWG
- No. 1/0 AWG
Correct answer: No. 4 AWG
Explanation: According to CEC Rule 4-004(1)(a)(iv) along with Table 2 (and footnote 1 for dwelling unit services), for a 100 A service with 75°C rated aluminum conductors, a No. 4 AWG is permitted. Note 1 allows for an adjustment for dwelling unit services up to 100A.
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