NEC 2026 Compatible

An electrical panel is located in an area with an ambient temperature of 50°C. The feeder conductors are #4 AWG copper with R90 insulation. What is the maximum allowable ampacity for these conductors, considering the ambient temperature correction, according to the CEC?

Master Level📋 CEC Table 2, Table 5A, Rule 4-004Wire Sizing & Ampacity
A

65 Amperes

B

76 Amperes

C

85 Amperes

D

95 Amperes

Explanation & Direct Citation

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    Wire Sizing & Ampacity Practice Question: CEC Table 2, Table 5A, Rule 4-004 | SparkShift | SparkShift