Thank you for taking your valuable time to read this email and hopefully answer this question.
Given the following information for an electrical design for a restaurant electrical service. Please assume the load calculations are correct and the only issue is the size of the service entrance section.
An 800 amp, 120/208 volt 3 phase, 4 wire service entrance section is to be installed.
The service entrance section utilizes the "6 switch rule". It will have 4 fused disconnects.
The disconnect sizes are,
One 3 pole, 400 amp switch with 400 amp fuses
One 3 pole, 200 amp switch with 200 amp fuses
Two 3 pole, 200 amp switches with 150 amp fuses.
The calculated load on the service is 650 amps.
Again for this question we must assume the load calc's are correct, the feeders from the service are properly sized for the loads and protected accordingly as required by the NEC.
Note that in this question the sum of the switches will exceed 800 amps, also note that the sum of the fuses will also exceed 800 amps.
Please let me know if you feel that this is code compliant or not. If not please forward the code sections you believe this design would violate. Finally if at all possible, please identify the jurisdiction you represent.
Thank you all for your time on this question!
Given the following information for an electrical design for a restaurant electrical service. Please assume the load calculations are correct and the only issue is the size of the service entrance section.
An 800 amp, 120/208 volt 3 phase, 4 wire service entrance section is to be installed.
The service entrance section utilizes the "6 switch rule". It will have 4 fused disconnects.
The disconnect sizes are,
One 3 pole, 400 amp switch with 400 amp fuses
One 3 pole, 200 amp switch with 200 amp fuses
Two 3 pole, 200 amp switches with 150 amp fuses.
The calculated load on the service is 650 amps.
Again for this question we must assume the load calc's are correct, the feeders from the service are properly sized for the loads and protected accordingly as required by the NEC.
Note that in this question the sum of the switches will exceed 800 amps, also note that the sum of the fuses will also exceed 800 amps.
Please let me know if you feel that this is code compliant or not. If not please forward the code sections you believe this design would violate. Finally if at all possible, please identify the jurisdiction you represent.
Thank you all for your time on this question!
