disconnect requirements

[AZIGGY]

Hello this is Aziggy from,you guess it Arizona. Iv been in the trade for 8 years and I know enough to know you can be in the trade for decades and still not know or remember everything when it comes to the nec and local and city codes. With that I come to post a question about a current electrical installation. I have a exterior main service panel that is to be for the exterior lighting and power and a 100 amp sub panel.The main panel is located within 25 feet of the ses and approximately 50 feet away from the 100 amp sub panel.The sub panel is being feed via a 100 amp 2 pole breaker coming from the exterior main panel. Yet because the sub panel is more than 25 feet away from the main panel I need to have a service disconnect installed in accordance with nec 225.30(e) and 225.31. Now with all that said, the service disconnect being used for the 100 amp sub panel is a 200 amp non-fused. So what I have is 100 amp 2 pole breaker with 1/0 feeds passing through a 200 amp non-fused disconnect feeding the 100 amp sub panel. Can I do this or does the disconnect need to be fused to the amp rating of the sub panel?

 

[augie47]

(The formatting was difficult on my computer. I changed it and t hopefully didn't loose any pertinent info.)

Hello this is zziggy from,you guess it Arizona. Iv been in the trade for 8 years and I know enough to know you can be in the trade for decades and still not know or remember everything ;when it comes to the nec and local and city codes.;With that I come to post a question about a current electrical installation.;I have a exterior main&;service panel that is to be;for the exterior lighting and power and a 100 amp sub panel.The main panel is located within 25 feet of the ses and approximately 50 feet away from the 100 ;sub panel.The sub panel is being feed via a 100 amp 2 pole breaker coming from the exterior panel. Yet because the sub panel is more than 25 feet away from the main panel I need to have a service disconnect installed in accordance with nec 225.30(e) and 225.31. Now with all that said, the service disconnect being used for the 100 amp sub panel is a 200 amp non-fused.;So;what I have is 100 amp;2 pole breaker with 1/0 feeds passing through a 200 amp non-fused disconnect feeding the 100 amp sub panel. Can I do this or does the disconnect need to be fused to the amp rating of the sub panel?

 

[augie47]

Are the 200 amp main panel and the sub-panel on the same building ?

 

[AZIGGY]

disconnect requirements

The main panel is located outside about 50 feet away from the building on the ses pad. The disconnect is secured on strut and is located on the exterior wall of the building with a 18 inch rigid nipple passing through the wall into a LB and then up through another nipple into another LB and into the side of the sub panel.

 

[augie47]

If I follow correctly, my answer would be based on 225.36. If your 200 amp NF switch is marked suitable for service equipmemt you are good to go.