hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
Attached sketch shows main fused disco, fused disco A, fused disco B all at Bldg A outside wall. Bldg A and Bldg B are two separate buildings separated only by wood fence each side with distance of 15 feet.
Fused disco B shuts all ungrounded supply to Bldg B. Fused disco A shuts all power to Bldg A. Main fused disco is fed by utility POCO conductors and shuts power to both buildings.
Confusion is service entrance conductor definition Section 100 NEC 2014 points to conductors between underground service conductors and service equipment. Service equipment is defined any equipment necessary connected load end of service conductors to a building and intended to constitute main control and cut off switch.
I have someone that argues that Fuse disco B is service equipment and is main cutoff to bldg B. Same for fuse disco A service equipment main cut off power to bldg A. Conductors label CON B, CON A in sketch between trough and disconnects in sketch therefore are service entrance conductors. Also conductors CON A and CON B are load end of service conductors.
I looked and looked but I think main fused disco line side service disco are service conductors. However definitions are ambiguous, confusing and I just wanted to verify here if I am right or other someone in here.
Question:
1. Would service entrance conductors be conductors between trough and fused disco B label CON B and between trough and fused disco A label CON A Or line side of main fuse disco?
Note I have another question in another post about same layout however that is about grounding and this post is about which one is service entrance conductor.
Fused disco B shuts all ungrounded supply to Bldg B. Fused disco A shuts all power to Bldg A. Main fused disco is fed by utility POCO conductors and shuts power to both buildings.
Confusion is service entrance conductor definition Section 100 NEC 2014 points to conductors between underground service conductors and service equipment. Service equipment is defined any equipment necessary connected load end of service conductors to a building and intended to constitute main control and cut off switch.
I have someone that argues that Fuse disco B is service equipment and is main cutoff to bldg B. Same for fuse disco A service equipment main cut off power to bldg A. Conductors label CON B, CON A in sketch between trough and disconnects in sketch therefore are service entrance conductors. Also conductors CON A and CON B are load end of service conductors.
I looked and looked but I think main fused disco line side service disco are service conductors. However definitions are ambiguous, confusing and I just wanted to verify here if I am right or other someone in here.
Question:
1. Would service entrance conductors be conductors between trough and fused disco B label CON B and between trough and fused disco A label CON A Or line side of main fuse disco?
Note I have another question in another post about same layout however that is about grounding and this post is about which one is service entrance conductor.
. If I must refresh your memory: The first disconnect may be a meter disconnect switch per 230.82(3). You should check your POCO requirements to see if it is required. There is not any guidance in the code as to if or when this is or can be considered the service disconnect. Some say if its non fused, than its a meter disconnect, and if its fused than its a service disconnect (and OCPD) but this is not specifically stated anywhere. You will have to look at the poco requirements for meter disconnects and cold sequence metering and make a decision.