Equipment Grounding terminals for swimming pools

[david]

Just caught my eye 680.24 (f) the grounding terminal for the panel board shall be directly connected to the panelboard enclosure
so if this is a service panel the main bonding screw is not good enough to bond the equipment grounds to the panelboard enclosure. You must add an equipment ground terminal directly connected to the enclosure. I never noticed that before. A lot of sub panels have the removable link the equipment ground terminal would still be bonded with the main bonding after the link is removed and the neutral bus would be insulated from the enclosure. According to this wording you cant use the bonded terminal. you still must install an equipment ground terminal kit.
just never noticed that before it takes so much careful reading to catch these things

 

[Little Bill]

I seldom ever wire directly from a main panel, which means wiring is from a subpanel. The ground bar is always directly connected to the enclosure in a subpanel. So I never noticed that rule either, or even had a reason to.

 

[david]

I seldom ever wire directly from a main panel, which means wiring is from a subpanel. The ground bar is always directly connected to the enclosure in a subpanel. So I never noticed that rule either, or even had a reason to.

90 % of the sub-panels I see are either or type depending on what you do with the removable link. Electricians seldom provide an equipment ground kit unless the bonded buss gets filled or the equipment grounds are short in a panel upgrade

 

[Little Bill]

90 % of the sub-panels I see are either or type depending on what you do with the removable link. Electricians seldom provide an equipment ground kit unless the bonded buss gets filled or the equipment grounds are short in a panel upgrade

I find it faster/simpler to just add a ground bar. With a Greenlee drill-tap kit, I can pop in two 10-32 screws in quicker than I can fool with removing the link between bars in the panel. Plus some of the mfg state not to remove the bar/link because it lessens structural integrity of the bus.

 

[Dennis Alwon]

Just caught my eye 680.24 (f) the grounding terminal for the panel board shall be directly connected to the panelboard enclosure
so if this is a service panel the main bonding screw is not good enough to bond the equipment grounds to the panelboard enclosure. You must add an equipment ground terminal directly connected to the enclosure. I never noticed that before. A lot of sub panels have the removable link the equipment ground terminal would still be bonded with the main bonding after the link is removed and the neutral bus would be insulated from the enclosure. According to this wording you cant use the bonded terminal. you still must install an equipment ground terminal kit.
just never noticed that before it takes so much careful reading to catch these things

IMO, that is not what this section is saying. IMO, connect it to the main neutral bar / equipment grounding conductor bar and that is good enough.

 

[Little Bill]

(F) Grounding. The equipment grounding conductor terminals
of a junction box, transformer enclosure, or other enclosure
in the supply circuit to a wet-niche or no-niche luminaire
and the field-wiring chamber of a dry-niche luminaire shall be
connected to the equipment grounding terminal of the panelboard.
This terminal shall be directly connected to the panelboard
enclosure.

Seems pretty clear.

 

[don_resqcapt19]

If the circuit originates in the service equipment, I see the main bonding jumper as providing the connection required by this section. I don't see the rule as saying the EGC bar itself must be in physical contact with the enclosure.

I find it faster/simpler to just add a ground bar. With a Greenlee drill-tap kit, I can pop in two 10-32 screws in quicker than I can fool with removing the link between bars in the panel. Plus some of the mfg state not to remove the bar/link because it lessens structural integrity of the bus.

You probably can't actually do that if you are making your own holes and taping them, as the typical panel enclosure is not thick enough to engage two threads as required by 250.8(5).
The factory holes for this purpose are punch in a way that pushes metal out the back side to provide enough material to engage two threads.

 

[Little Bill]

If the circuit originates in the service equipment, I see the main bonding jumper as providing the connection required by this section. I don't see the rule as saying the EGC bar itself must be in physical contact with the enclosure.

You probably can't actually do that if you are making your own holes and taping them, as the typical panel enclosure is not thick enough to engage two threads as required by 250.8(5).
The factory holes for this purpose are punch in a way that pushes metal out the back side to provide enough material to engage two threads.

The panels have "starter holes" there already. They are not threaded but are for a ground bar, and metal is thick enough to get more than two threads. Also, the holes line up with the ground bar holes.

 

[LarryFine]

The panels have "starter holes" there already. They are not threaded but are for a ground bar, and metal is thick enough to get more than two threads. Also, the holes line up with the ground bar holes.

I have found that it's worth getting the same brand of accessory bus as the panel, as they don't all have the same spacing.

 

[Little Bill]

I have found that it's worth getting the same brand of accessory bus as the panel, as they don't all have the same spacing.

I meant to add that I use the same brand bar as the panel. Most times it's Eaton.