- Location
- Massachusetts
Re: GREEN GROUND SCREW
JMO, Bob
I do not understand the question.
JMO, Bob
GREEN GROUND SCREW
- Thread starter littlerich
- Start date
- Status
- Location
- Illinois
- Occupation
- retired electrician
Re: GREEN GROUND SCREW
jro,
Don
jro,
That is the intent of 250.8. The wire termination itself must be a listed product, the screw or bolt used to connect the wire termination to the box is not required to be a listed product. Just like the bolts use to connect buss bar are not listed for that use.
Don
brian john
Senior Member
- Location
- Leesburg, VA
Re: GREEN GROUND SCREW
green #12 thhn stranded under a 8/32, not good
Would you put the stranded under a 10/32 green screw?
green #12 thhn stranded under a 8/32, not good
Would you put the stranded under a 10/32 green screw?
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: GREEN GROUND SCREW
Fro stranded grounding pigtails, I make my own with a crimp on, non insulated fork connector. Pretty fast to make up a bunch all at once
Fro stranded grounding pigtails, I make my own with a crimp on, non insulated fork connector. Pretty fast to make up a bunch all at once
G
Guest
Guest
Re: GREEN GROUND SCREW
Do you use listed connectors and listed ratcheting crimpers, or do you just use the Panduits and a cheapie, cheapie crimper?
Do you use listed connectors and listed ratcheting crimpers, or do you just use the Panduits and a cheapie, cheapie crimper?
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: GREEN GROUND SCREW
Wayne: This isn't a shot at you, just a general statement.
I might get kicked around for this, but...like I said before, why sweat the small stuff? I think we have enough to worry about without things like listed ratcheting crimpers.
Wayne: This isn't a shot at you, just a general statement.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: GREEN GROUND SCREW
I have a set of the listed ratcheting crimpers, but they are for insulated terminals. I'm using non-insulated terminals, and the standard T&B Stay-kon WT111 works great.
By the way, in certain industries such as nuclear power, ratcheting crimpers have to be calibrated, as they sweat the small stuff. The incorrect crimp tool can cause the connection to fail. We don't see this too much with 120V loads, but I have seen many failed crimps on police cars and rescue rigs due to higher current at 12V. Some of the light bars will draw 20 to 40 amps.
I have a set of the listed ratcheting crimpers, but they are for insulated terminals. I'm using non-insulated terminals, and the standard T&B Stay-kon WT111 works great.
By the way, in certain industries such as nuclear power, ratcheting crimpers have to be calibrated, as they sweat the small stuff. The incorrect crimp tool can cause the connection to fail. We don't see this too much with 120V loads, but I have seen many failed crimps on police cars and rescue rigs due to higher current at 12V. Some of the light bars will draw 20 to 40 amps.
Re: GREEN GROUND SCREW
Tom interesting to hear you say that. The telcoms I have worked for all require calibrated crimpers such as the T&B WT111, TBM-8 TBM-25, TBM-14, etc. They even go as far as each crimp is inspected for proper termination. I have seen a many installers and electricians escorted out the door using unapproved or out of calibrations date crimpers. You hit the nail on the head, low voltage DC, but it is carried on to the AC and grounding systems.
Tom interesting to hear you say that. The telcoms I have worked for all require calibrated crimpers such as the T&B WT111, TBM-8 TBM-25, TBM-14, etc. They even go as far as each crimp is inspected for proper termination. I have seen a many installers and electricians escorted out the door using unapproved or out of calibrations date crimpers. You hit the nail on the head, low voltage DC, but it is carried on to the AC and grounding systems.
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