ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
Air Compressor feeder conductor sizing
by Potseal. 01/15/18 09:08 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 14 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
TVSS question #15188
10/09/02 06:46 PM
10/09/02 06:46 PM
S
sparky  Offline OP
Member
Joined: Oct 2000
Posts: 5,342
I have a BV bb Q here that i cannot answer, any help appreciated...

Quote
It installs in a 1/2 inch KO in panelboard. It is connected to a two pole 20 amp circuit breaker. The service panel is: 200Amp., 120/240V, single phase. There are three conductors on the TVSS, two black and one green.
When looking through catalogs I've often seen the same type with two black, one white and one green conductor. I guess my question is: What is the difference if any.
Frank


~Steve

Work Gear for Electricians and the Trades
Re: TVSS question #15189
10/09/02 06:59 PM
10/09/02 06:59 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,917
Brick, NJ USA
Sparky:
IF you are talking "Sentrex" TVSS, by Wiremold, they come in many flavors:
1 phase, 4 wire, 120/240 volt
3 phase, 5 wire (Y & Delta)
1 phase, 3 wire; 120/240 volt
3 phase, 4 wire;120/208Y
3 phase, 4 wire; 277/480 Y

Some have a neutral, some don't; all have grounds,to the best of my knowledge.
More info at Wiremold Website
(Damn, if I knew how to make a link, and where the "trademark" symbol is; oh well, I'm a 'lectrician, not a computer wiz)
John


John
Re: TVSS question #15190
10/09/02 10:58 PM
10/09/02 10:58 PM
W
wolfdog  Offline
Member
Joined: Oct 2001
Posts: 135
Dallas,TX
Panamx is designed for a 2 pole 240 volt breaker. They have two black wires and one green.

Maybe his is designed for 120 volt operation and protects two 120 volt lines.

Re: TVSS question #15191
10/10/02 02:09 AM
10/10/02 02:09 AM
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,708
Anaheim, CA. USA
From the description, it sounds like a 240 VAC 1 Phase 2 wire TVSS device.
This would be connected via a 2 pole c/b.

Maybe the Person that posted this Q' could add some Specs from the TVSS device, such as System Voltage.

I am 90% [0.9] sure this would be used on a 200 - 240 VAC 1 Phase 2 Wire type system. Not sure how helpful it would be for 120/240 VAC 1 Phase 3 Wire systems, since there is no connection for the Grounded Noodle Conductor, but that's another story.
[Linked Image]

Scott S.E.T.

p.s. let me know if I guessed correctly, or failed the "Whaddaheck Is This TVSS Device" test.


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
Re: TVSS question #15192
10/10/02 05:56 AM
10/10/02 05:56 AM
S
sparky  Offline OP
Member
Joined: Oct 2000
Posts: 5,342
thannks guys;
i think i'll refer the individual to this thread, maybe then we can be more specific
[Linked Image]

Re: TVSS question #15193
10/10/02 09:08 AM
10/10/02 09:08 AM
J
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
The number of wires indicate what type of protection you will have.

Line to Line, and Line to Ground - multiple blacks and a green only
Line to Neutral(noodle) and Line to Ground - 1 black, 1 white, and 1 green
Line to Line, Line(s) to Neutral, Line(s) to Ground - multiple blacks, 1 white, and 1 green

Re: TVSS question #15194
10/10/02 04:44 PM
10/10/02 04:44 PM
F
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
My electrical service is: 120/240V, 3W, single phase, 200 amps.
It sounds as if I should of purchased a TVSS with 2 black wires, one white and one green instead of 2 black wires and one green. Actually I grabbed the last one on the shelf at Home Depot. I didn't bother to even look at it until I got home. I assumed all TVSS came with a white (neutral) conductor.
The instructions indicated that a 15 amp 2 pole CB was necessary, which I did install.
I assume I don't have line to neutal protection.

Re: TVSS question #15195
10/10/02 07:26 PM
10/10/02 07:26 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,917
Brick, NJ USA
Frank:
IMHO, you do not have line to neutral (120 volt) protection. You have 240 volt, phase to phase protection. You could put it back in the box, & take it back to the orange apron store, like a lot of people do. They usually don't check to careful. It goes back on the shelf, and someone else "gets it".
There's a lot of "used" stuff that gets back on the shelves.

John


John
Re: TVSS question #15196
10/11/02 05:19 AM
10/11/02 05:19 AM
F
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
John-
That's kind of what I thought. Thanks for the information. I'll return it this weekend and get the proper TVSS.
Frank

Re: TVSS question #15197
10/11/02 11:09 AM
10/11/02 11:09 AM
T
tdhorne  Offline
Member
Joined: Mar 2001
Posts: 345
Maryland, USA
Frank

The TVSS with only three conductors is suitable for use in service equipment as the grounded conductors (neutrals) and the Equipment Grounding Conductors are all attached to the Grounding Electrode Conductor at that point. Since the neutral and EGCs are common in service equipment there is no need for two conductors and two sets of MOVS in the service equipment. In panel that was not service equipment the grounded buss and the grounded conductor buss bar would be separate and one lead to connect each to the TVSS would be needed.
--
Tom


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison
Page 1 of 2 1 2

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
HotLine1
HotLine1
Brick, NJ USA
Posts: 6,917
Joined: April 2002
Show All Member Profiles 
Top Posters(30 Days)
sparky 20
Admin 20
Potseal 13
Popular Topics(Views)
243,537 Are you busy
180,340 Re: Forum
170,829 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.025s Queries: 15 (0.006s) Memory: 1.0243 MB (Peak: 1.2011 MB) Zlib enabled. Server Time: 2018-01-18 14:09:13 UTC