Wrapping External Bonding Jumpers around LFMC?

Status
Not open for further replies.
Linked from Article 350.60; 250.102 is what it lists but (E)... & (2) says yes if less than six feet. One has to meet everything and somehow allow it back inside the terminal block and pecker head, for example. And all the Informational note(s) of 500ish from within 350.60.

:)
 
Last edited:
I have heard people say that wrapping (spiral) the bonding around the LFMC is a code violation, but cannot find anything that really says that. I guess if you could prove that the increased impedance from the spiral path around the ferrous metal in the LFMC impaired the fault clearing path, that it would be a violation.
I asked this question of one of the former chairs of CMP5 and he said it is not a violation.
 
Thanks

Thanks

What I have also seen is the BJ run along the length of the LFMC and tie-wrapped every 5-6 inches with a typical nonconductive tie wrap.

I will probably not try to make real big issue with this. The main thing is that they did install it!! My focus appears to need to be on making sure a contractor does not wrap a BJ too many times and then make sure it is terminated properly at each end. We also always design to have an EGC in all our conduits for every circuit.

Thanks for your help.
 
Why would you want to do this.
I once had to do something similar at a bulk fueling pump. The plans called for a #8 to be tied to the bulk hose and then to a spring clip to ground the truck to the dispenser. I wonderd how long this set up would last before the connector failed or the Zip ties broke.
This was years ago and of course not LFMC.
 
They do it because it is easier and quicker to wrap it than to use a number of wire ties to hold it in place.
 
Sierrasparky said:
Why is it not inside the conduit?
I suppose i am missing something here.
Click to expand...

The only thing that I can think of is original installation is in RMC, then it transitions into flex to go to the motor and since Flex has EGC limitations then a externally mounted bonding jumper gets installed between the RMC and the frame of the motor.
 
[ flexQUOTE=edward;1544072]The only thing that I can think of is original installation is in RMC, then it transitions into flex to go to the motor and since Flex has EGC limitations then a externally mounted bonding jumper gets installed between the RMC and the frame of the motor.[/QUOTE] that is why I believe there should be a j box between the RMC and the flex.
 
Status
Not open for further replies.
Top