200 amp Quick Disconnect?

Reply

  #1  
Old 01-16-08, 11:44 AM
Member
Thread Starter
Join Date: Oct 2006
Location: Illinois..........USA
Posts: 28
Received 0 Votes on 0 Posts
200 amp Quick Disconnect?

Ok, In the proses of back porch remod.....Box and wiring is a MESS!! Almost to that point of box location, etc. ,etc...
My plan is to install 200 amp disc. off the meter base. Run service in to new 40/40 box. Was advised to buy lug load center box, wouldn't need the 200 amp main with the discon.
Ok, But.............Have done some checking around...local lumberyard,lowes,vally elec. service to mention a few. 200 amp main lug box will be special order and just as expensive as 40/40 with main breaker included.
So my question is, would there be any problem with having 200 amp breaker @ discon. & 200 amp main breaker at the box?
Sorry if this has been asked before.......Thanks
 
Sponsored Links
  #2  
Old 01-16-08, 12:33 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,944
Received 42 Votes on 40 Posts
After leaving the meter, how far do the wires need to run inside the house to get to the new 40/40 panel? Code allows for a short distance, usually about 5 feet. If the distance is longer than 5', then you must install an external disconnect.

If you need (or want) a disconnect at the meter, I would recommend a meter/main combo box like this one:

http://www.lowes.com/lowes/lkn?actio...200&lpage=none

Be sure to check with your power company before buying to make sure your box is compatible with their meter style. Note that the panel in the house then becomes a subpanel which requires four wire feed and isolated grounds and neutrals.

You are allowed to have both an external disconnect breaker and a main breaker inside at the panel, but only one or the other is required.
 
  #3  
Old 01-16-08, 12:43 PM
Member
Thread Starter
Join Date: Oct 2006
Location: Illinois..........USA
Posts: 28
Received 0 Votes on 0 Posts
Yea, original plan was to locate box on interior wall with meter base on outer....with diff. location in mind,will be appx. 15' from meter base. So with the added dist. you would recomend disc. at meter base? I understand this would protect service line.....any prob. with additional main breaker at the box? Thanks
 
  #4  
Old 01-16-08, 12:46 PM
Member
Thread Starter
Join Date: Oct 2006
Location: Illinois..........USA
Posts: 28
Received 0 Votes on 0 Posts
Duh, just read last sec. of your post........ Sorry...
 
  #5  
Old 01-16-08, 03:38 PM
Member
Join Date: Oct 2007
Location: USA
Posts: 127
Received 0 Votes on 0 Posts
Did I read this right? Does the NEC 2008 version require separate ground and neutrals in teh main disconnect panel?

What would be the advantage of removing the bonding strap and installing the ground on one side of the bar out to 2 ground rods andthe oher side keep all the neutrals connected to the incoming neutral?

Follow my logic:
1) 3 wire (H/H/N) from pole to meter and 3 wire to disconnect (main panel)
2) Meter and mast is not grounded
3) ground is separate from neutral in panel. Panel is grounded.
4) ground bar is connected to 2 rods with bare #6 cu.
5) neutral bar is connected to incoming service neutral

If the mast is hit by lightning wouldn't the bare neutral be energized all the way to my panel and out to my recepticles and lights?
 
  #6  
Old 01-16-08, 03:54 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,944
Received 42 Votes on 40 Posts
Originally Posted by fixeruper View Post
will be appx. 15' from meter base
If that 15' of wire runs through the house, then an external disconnect is required. If the 15' of wire runs along the outside of the house, a disconnect is not required.
 
  #7  
Old 01-16-08, 04:00 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,944
Received 42 Votes on 40 Posts
Originally Posted by Thonati View Post
Did I read this right? Does the NEC 2008 version require separate ground and neutrals in teh main disconnect panel?
You're confusing what the main panel is. As defined by the code, the "main" panel is the first disconnect after the meter. Therefore if you have an external disconnect out by the meter, that panel is your "main" panel where the neutral and ground will be bonded. The ground and neutral are bonded only at the main panel. Your grounding electrode conductor (which connects to the ground rods) terminates at the main panel.

This means that the inside panel must be configured as a subpanel with separate ground and neutral conductors and bus bars.
 
  #8  
Old 01-16-08, 04:06 PM
Member
Join Date: Oct 2007
Location: USA
Posts: 127
Received 0 Votes on 0 Posts
Shew!!

OK, so for those of us that have a panel in the house with disconnect SHOULD have the neutrals and grounds bonded together. This would answer my question of a lightning strike.

Any sub-panels subsequently installed requires a 4 wire with ground and neutral separate at the sub panel. The ground wire comes back to the main panel and grounded the rods.

I must have read it wrong regarding the changes to the NEC 2008.
 
Reply

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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: