wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Strangely, this section is missing the usual exception for 100% rated OCPD.
Cheers, Wayne
625.41 Overcurrent Protection.
Overcurrent protection for feeders and branch circuits supplying EVSE and WPTE, including bidirectional EVSE and WPTE, shall be sized for continuous duty and shall have a current rating of not less than 125 percent of the maximum load of the equipment. Where noncontinuous loads are supplied from the same feeder, the overcurrent device shall have a current rating of not less than the sum of the noncontinuous loads plus 125 percent of the continuous loads.
Exception: Where the assembly, including the overcurrent devices protecting the feeder(s), is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load.
Statement of Problem and Substantiation for Public Input
Every other section in the NEC that requires a 125% continuous use factor includes an exception for 100% rated OCPD. There is no technical reason to omit the exception here. The proposed wording is copied verbatim from 215.3 Exception 1.
Cheers, Wayne
625.41 Overcurrent Protection.
Overcurrent protection for feeders and branch circuits supplying EVSE and WPTE, including bidirectional EVSE and WPTE, shall be sized for continuous duty and shall have a current rating of not less than 125 percent of the maximum load of the equipment. Where noncontinuous loads are supplied from the same feeder, the overcurrent device shall have a current rating of not less than the sum of the noncontinuous loads plus 125 percent of the continuous loads.
Exception: Where the assembly, including the overcurrent devices protecting the feeder(s), is listed for operation at 100 percent of its rating, the ampere rating of the overcurrent device shall be permitted to be not less than the sum of the continuous load plus the noncontinuous load.
Statement of Problem and Substantiation for Public Input
Every other section in the NEC that requires a 125% continuous use factor includes an exception for 100% rated OCPD. There is no technical reason to omit the exception here. The proposed wording is copied verbatim from 215.3 Exception 1.