hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
Attached sketch shows incoming electric utility service to enclosed circuit breaker which then feeds fire pump controller ATS combo which feeds fire pump. The ATS controller combo is also fed by generator.
The enclosed circuit breaker is part of listed fire pump assembly service rated and has overcurrent protection in compliance with NEC 2014 Article 695.4(B)(2)(a)(2) and has following:
Short circuit protection only
Magnetic only - non thermal
Instantaneous trip setting (factory set non field adjustable)
No time delay element
Following questions:
1. For FDR #1 attached sketch between enclosed breaker and fire pump controller ATS combo which one of the following NEC 2014 Article.250.122(D)(1) or 250.122(D)(2) or some other code be used to size equipment grounding conductor?
2. For FDR #2 attached sketch between fire pump and controller ATS combo which one of the following NEC 2014 Article 250.122(D)(1) or 250.122(D)(2) or some other code be used to size equipment grounding conductor?
Sent from my SM-G935U using Tapatalk
The enclosed circuit breaker is part of listed fire pump assembly service rated and has overcurrent protection in compliance with NEC 2014 Article 695.4(B)(2)(a)(2) and has following:
Short circuit protection only
Magnetic only - non thermal
Instantaneous trip setting (factory set non field adjustable)
No time delay element
Following questions:
1. For FDR #1 attached sketch between enclosed breaker and fire pump controller ATS combo which one of the following NEC 2014 Article.250.122(D)(1) or 250.122(D)(2) or some other code be used to size equipment grounding conductor?
2. For FDR #2 attached sketch between fire pump and controller ATS combo which one of the following NEC 2014 Article 250.122(D)(1) or 250.122(D)(2) or some other code be used to size equipment grounding conductor?
Sent from my SM-G935U using Tapatalk