Question

A 1000 VA, 120 x 12-volt lighting transformer is connected to a 15-amp circuit breaker with 14 AWG copper conductors. The secondary conductors are 4 AWG copper THHN/THWN. Is this primary protection only adequate per the NEC®? Compare the requirements of NEC® 450.3 with 240.4(F).

Name: a 1000 va 120 x 12 volt lighting transformer is connected to a 15 amp circuit breaker with 14 awg copper conductors the secondary conductors are 4 awg copper thhnthwn is this primary protect 01065
Uploaded: 2024-02-25T20:31:21-08:00
Duration: 2 min 43 s
Channel: Ashar Tanveer
Description: a 1000 va 120 x 12 volt lighting transformer is connected to a 15 amp circuit breaker with 14 awg copper conductors the secondary conductors are 4 awg copper thhnthwn is this primary protect 01065

          A 1000 VA, 120 x 12-volt lighting transformer is connected to a 15-amp circuit breaker with 14 AWG copper conductors. The secondary conductors are 4 AWG copper THHN/THWN. Is this primary protection only adequate per the NEC®? Compare the requirements of NEC® 450.3 with 240.4(F).

Added by Charles W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Ashar Tanveer

02/25/2024

Step 1

This means the primary current can be calculated using the formula: \[ I_{primary} = \frac{VA}{V} = \frac{1000 VA}{120 V} \approx 8.33 A \] Show more…

Show all steps

Thanks for your feedback!

A 1000 VA, 120 x 12-volt lighting transformer is connected to a 15-amp circuit breaker with 14 AWG copper conductors. The secondary conductors are 4 AWG copper THHN/THWN. Is this primary protection only adequate per the NEC®? Compare the requirements of NEC® 450.3 with 240.4(F).