InterNACHI


Go Back   InterNACHI Inspection Forum > Specific Inspection Topics > Electrical Inspections

Notices

Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

Reply
 
LinkBack Thread Tools
  #1  
Old 8/5/06, 8:16 PM
pdickerson pdickerson is offline
InterNACHI Member
 
Join Date: May 2004
Location: Clinton, WA
Posts: 341
Default Another Service Entrance Amps Question

Usually when I see two 200 amp service panels there is a CT can and a CL 10 meter. At this morning's inspection, there were two 200 amp panels, but there was no CT can (I think), and there was a CL 200 meter. The meter cab was larger than normal, but smaller that the CT cans I am used to seeing. Can they fit the current transformers in the meter cab in the photo? Am I correct in stating that this is a 200 amp service as limited by the meter, or is this a 400 amp service? The lateral conduit looked large enough for a 400 amp service. Is there any issue with potentially too much current running through the meter, or is the meter only metering shunt current (is that the right wording)? Or maybe its OK because the load calc worked out to under 200 amps??? 3550 SF home, all electric, 2 water heaters, 2 ovens, lots of bells and whistles. Thoughts?
Attached Thumbnails
another-service-entrance-amps-question-p1190102.jpg   another-service-entrance-amps-question-p1190009.jpg  
Reply With Quote
  #2  
Old 8/5/06, 8:54 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Another Service Entrance Amps Question

That is technically a 320 amp service. This setup uses a 320 amp plug-in style 200CL meter. It is generally referred to as a 400 amp service because of the two 200 amp panels.
This is perfectly legal and safe, as long as the calc load is under 320a.
It is a very common installation.

I am really not sure how or why they use a 200CL meter but that is the POCO's decision. We have no say in these matters. We simply provide a meter pan style approved by them.
Reply With Quote
  #3  
Old 8/7/06, 4:39 PM
Paul W. Abernathy's Avatar
Paul W. Abernathy Paul W. Abernathy is offline
InterNACHI Member
 
Join Date: Sep 2005
Location: Spotsylvania, VA
Posts: 8,047
Send a message via AIM to pabernathy Send a message via MSN to pabernathy Send a message via Skype™ to pabernathy
Default Re: Another Service Entrance Amps Question

Also some POCO's do Diversified loads and do have a 400A TRUE CAPACITY meter can available...I know as I picked up (2) of them today...



Paul W. Abernathy,CMI,CPI,CME
National Electrical Code Expert
Electrical & Fire Protection Systems Code Supervisor- Alexandria,VA
Weekly Live Radio Show :http://en.1000mikes.com/show/the_electrical_guru
Weekly Chat on Wednesdays -7:30 PM E.S.T
* Get my 13 hour commentary audio CD for the book "How to Perform Electrical Inspections"

2007 InterNACHI Member of the Year
Reply With Quote
Reply

Thread Tools

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Service Entrance Question ehyde Electrical Inspections 8 6/8/07 2:14 PM
Service Entrance jcampbell Electrical Inspections 9 10/30/06 1:14 AM
90 or 180 Amps? jweinberg Electrical Inspections 73 3/15/06 11:42 PM
Main service disonnect question jmichalski Electrical Inspections 5 1/29/06 5:32 PM
Service Entrance DSuelflow Electrical Inspections 11 1/21/06 6:14 PM


All times are GMT -4. The time now is 5:43 PM.


Popular Sections

:

All Sections

Inspection News

InterNACHI Membership

Inspection Standards

Inspection Education

InterNACHI Inspectors

Inspection Links

 

 

 

NACHI.ORG Statistics

 

 

no new posts