Bonding

[Dave123]

Must you alway's bond boxes that conductors pass through or only if splices are made in the box.

[neil seidner]

Yes you must. The code rules are 10-302(1) and 10-404(1)(b).

The only exceptions would be; A metal box that is already bonded to ground by another means (for example a metal pull box or condulet in an EMT conduit system). Or a PVC box that is NOT used as an outlet (if the PVC box is used as an outlet, you would still wrap the bond wire around the ground screw or provide some method of bonding a connection to ground).

[twh]

What if you use the box as a pull box, as you would use an LB, and just pull through it. Do you need to pull extra ground wire into the pull box to connect to the box?

[neil seidner]

If the entire "conduit/pull-box" installation was made of metal and already properly bonded to ground, then no.

<font color="#a62a2a"><font size="1">[ March 15, 2004 10:37 PM: Message edited by: ccrash ]</font></font>

<font color="#a62a2a" size="1">[ March 15, 2004 10:38 PM: Message edited by: ccrash ]</font>

[twh]

Come on! Dig out your code book. Where does it say that?

[u2slow]

10-610(a) does it for me [img]wink.gif[/img]

[twh]

I agree. Now, consider parallel runs with parallel bonding conductors running through the same pull box; or, two separate runs sharing the same pull box; or, two bonding conductors in the same conduit. Rule 10-808(2) seems to treat this differently.

[neil seidner]

It seems as if the intent of 10-808(2) is that if there are more than one bonding conductors in a box then they must all be connected together. Using one of two methods, bonding each conductor to the box or splicing the wires together with only one wire bonded to the box. The last sentence dealing with the disconnection or removal of a receptacle or device seems to indicate that the rule deals mainly with the method of making the bonding connection.

[twh]

Not that I would do it differently than you would, nor am I certain of the intent of the rule, but I think the rule actually requires something else. Although devices are mentioned, it doesn't necessarily follow that the rule only applies to boxes where devices are present. It doesn't exclude pull boxes, either.

As written, doesn't the rule require bonding a pull box, where there is more than one bond conductor?

[Dave123]

Ok, sounds as though the specific situation I was dealing with will not require the bonding conductor be attached to the box, in this case A 4x4 box ? a single EMT into 4x4 then one EMT out to another device box containing a light fixture.

However, in the case where a pull box(es) immediately feed a panelboard and you have multiple EMT?s into the pull boxes, must all bonding conductors be spliced in the pull box. Sorry if You've already answered this... just want to be sure.