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11-18-2009, 02:40 PM
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#1
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Junior Member
Join Date: Nov 2009
Location: CA
Posts: 3
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TVSS Panel Tie-In
I have a situation which requires installing a external TVSS on a branch panel that is full. I can either install a CB somewhere near the top of the box and sneak-in under the bus lugs (against code) or what? Any bright ideas?
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11-18-2009, 03:18 PM
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#2
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Jobless Extraordinaire
Join Date: Aug 2009
Location: Texas
Posts: 785
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Is there room to add a small sub? Move a couple circuits to it?
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11-18-2009, 03:45 PM
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#3
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Junior Member
Join Date: Nov 2009
Location: CA
Posts: 3
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They just went down with drywall but yes, I could do this. The concern I have is that I need to protect loads located on the main panel. The distance from the TVSS to the sub and then to the target loads is much to far for the TVSS to be effective.
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11-18-2009, 04:13 PM
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#4
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Jobless Extraordinaire
Join Date: Aug 2009
Location: Texas
Posts: 785
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What type of panel and TVSS are you working with? Is this Resi or Comm?
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11-18-2009, 04:22 PM
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#5
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Junior Member
Join Date: Nov 2009
Location: OR
Posts: 11
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They are some manufactuers that offer surge circuit breakers that provide whole panel protection while not using up any spaces in the panel. See this link. http://www.stopsurges.com/SIEMENS-QS...20-QSA2020.htm
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11-18-2009, 06:29 PM
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#6
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Stiff Member
Join Date: Jul 2009
Location: Sebring, FL
Posts: 129
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two words, tandem breakers.
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11-18-2009, 06:40 PM
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#7
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Senior Member
Join Date: Nov 2009
Location: Danville, CA
Posts: 794
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Quote:
Originally Posted by EE1
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Two summers ago we added these same type to protect over 25 panels during a school remodel (3P 4W 208V.) Very cost efficient and effective.
__________________
Upping my post count one mistake at a time!
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11-18-2009, 08:48 PM
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#8
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Member
Join Date: May 2009
Location: Arizona, USA
Posts: 75
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Quote:
Originally Posted by Control4_Ever
I have a situation which requires installing a external TVSS on a branch panel that is full. I can either install a CB somewhere near the top of the box and sneak-in under the bus lugs (against code) or what? Any bright ideas?
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You should read thru article 285 NEC, installation after the main disco. is
allowed just about anywhere, it's only two pages !!
__________________
Frank, Arizona,USA
It's what you learn after you know it all that counts
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11-18-2009, 08:52 PM
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#9
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Senior Member
Join Date: Aug 2007
Location: Orange County NY
Posts: 252
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 Whats the NEC?
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11-18-2009, 08:59 PM
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#10
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Member
Join Date: May 2009
Location: Arizona, USA
Posts: 75
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Quote:
Originally Posted by Sparky480
Whats the NEC? |
In your case it would be" Never Ending Comments" 
__________________
Frank, Arizona,USA
It's what you learn after you know it all that counts
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11-18-2009, 09:40 PM
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#11
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Senior Member
Join Date: Aug 2007
Location: Orange County NY
Posts: 252
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11-19-2009, 12:00 PM
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#12
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Junior Member
Join Date: Nov 2009
Location: CA
Posts: 3
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Quote:
Originally Posted by idontknow
two words, tandem breakers.
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TVSS requires 2 poles so a quad-tandem breaker would displace one additional slot. I would need to gang on two wall outlet circuits to make that happen. Q23020 breaker would be the closest thing to working though. TVSS is Leviton 54000.
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11-19-2009, 09:50 PM
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#13
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Stiff Member
Join Date: Jul 2009
Location: Sebring, FL
Posts: 129
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Quote:
Originally Posted by Control4_Ever
TVSS requires 2 poles so a quad-tandem breaker would displace one additional slot. I would need to gang on two wall outlet circuits to make that happen. Q23020 breaker would be the closest thing to working though. TVSS is Leviton 54000.
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No silly, take 4 single pole breakers of the same amperage in your panel. Replace those 4 breakers with 2 tandem breakers. You'll now have 2 open spaces to install your new double pole breaker to power your TVSS
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11-20-2009, 12:18 AM
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#14
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Senior Member
Join Date: Jan 2009
Location: Chicago
Posts: 594
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yep yep!
__________________
Its not just a job, it's a career!!!
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11-21-2009, 09:47 AM
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#15
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Senior Member
Join Date: Jan 2007
Location: Baltimore, MD, USA
Posts: 3,490
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Quote:
Originally Posted by idontknow
No silly, take 4 single pole breakers of the same amperage in your panel. Replace those 4 breakers with 2 tandem breakers. You'll now have 2 open spaces to install your new double pole breaker to power your TVSS
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You first need to make sure that your panel is rated for tandem breakers - not all of them are.
__________________
John from Baltimore
"One day at a Time"
All responses based on the '08 NEC
It's not my fault, it's not my problem, I'm not your solution. 
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