Disconnect question - Electrician Talk - Professional Electrical Contractors Forum
Go Back   Electrician Talk - Professional Electrical Contractors Forum > Electrical Forum > General Electrical Discussion

Thread Tools Display Modes
Old 08-10-2014, 08:31 PM   #1
Senior Member
Join Date: Nov 2007
Posts: 336
Rewards Points: 282
Default Disconnect question

My company has one work site that has outgrown its existing service.

Right now, the POCO has 3 phase, 200 amp, 250 volt service running down a utility pole, thru their Kw-hr meter, into our 400 amp TB. From the TB, the underground service wires run to 4 different buildings.

The manager wants to add a disconnect between the POCO meter & our TB; both for emergency isolation & because it just makes sense.
I asked the POCO Eng if he wanted to increase his service drop or CT the meter, but as of now, all that they will do is kill the power & lift the service mast off for me to install my new disconnect.

I could not find anywhere in the Code where it would require fuses, but I ordered a fused Disco anyway. I would rather blow a 400 amp fuse than ruin a 200' run of USE if there ever was a fault.
Is there any requirement to fuse that Disco?
subelect is offline   Reply With Quote
Join Contractor Talk

Join the #1 Electrician Forum Today - It's Totally Free!

ElectricianTalk.com - Are you a Professional Electrical Contractor? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's the leading place for electricians to meet online. No homeowners asking DIY questions. Just fellow tradesmen who enjoy talking about their business, their trade, and anything else that comes up. No matter what your specialty is you'll find that ElectricianTalk.com is a great community to join. Best of all it's totally free!

Join ElectricianTalk.com - Click Here JOIN FOR FREE

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ElectricianTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Sponsored Links
Old 08-10-2014, 09:30 PM   #2
Bilge Rat
Join Date: Aug 2007
Location: Fernley, Nevada (near Reno)
Posts: 6,876
Rewards Points: 3,360

I'm not sure, but I believe it would need overcurrent protection.

The reason is the wire is considered a service from the POCO to the line side of the disco, then it'd be a feeder from the disco to the TB. Feeders require O/C protection.

Also, 230.90 states that each ungrounded service conductor shall have overload protection.
micromind is offline   Reply With Quote
The Following User Says Thank You to micromind For This Useful Post:
subelect (08-10-2014)

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spa Disconnect Question 277v Residential Electrical Forum 19 02-24-2014 06:19 PM
Disconnect question wjf General Electrical Discussion 15 12-16-2012 05:17 PM
Disconnect Question lims640 General Electrical Discussion 25 12-01-2012 11:27 PM
A-C disconnect question CertElectric NEC Code Forum 2 09-01-2011 10:39 PM
Disconnect question. Mr. Sparkle General Electrical Discussion 12 08-30-2010 05:08 PM

All times are GMT -4. The time now is 03:03 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Our Pro Sites Network
ContractorTalk.com | DrywallTalk.com | HVACSite.com | PaintTalk.com | PlumbingZone.com | RoofingTalk.com