VALZ
Member
- Location
- New York, USA
Hello all,
I was wondering if anyone can put this issue to bed for me in direct code reference terms. I have searched the forums and could not find this direct question... Disconnects, fused and non fused. Should the frames be independently bonded with a "lug" or "terminal bar" to the frame even if the disconnect has a bonding bushing located inside of it with the ground properly attached to the bonding bushing lug. And or in a fused disconnect with a bonding screw in place bonding the neutral to the ground. In my opinion, yes, even if the disconnect has a bonding bushing and a bonding screw neu/grd(fused disct) it should also have a mechanical attachment directly to the frame.
I have referenced... 408.40 Grounding of Panelboards. Panelboard cabinets and panelboard frames, if of metal, shall be in physical contact with each other and shall be connected to an equipment grounding conductor. Where the panelboard is used with nonmetallic raceway or cable or where separate equipment grounding conductors are provided, a terminal bar for the equipment grounding conductors shall be secured inside the cabinet. The terminal bar shall be bonded to the cabinet and panelboard frame, if of metal; otherwise it shall be connected to the equipment grounding conductor that is run with the conductors feeding the panelboard.
and then...Panelboard. A single panel or group of panel units designed for assembly in the form of a single panel, including buses and automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a cabinet or cutout box placed in or against a wall, partition, or other support; and accessible only from the front.
I have been always under the impression that a bonding bushing bonds "the conduit to the frame" and the bonding screw bonds the "neutral to ground", none of which I believe are a direct purpose to bonding the frame for the sake of bonding the frame.
If I am wrong on any of these accounts please inform me, if I am correct please inform me as well. Either way anyone who knows a direct code reference to either call out a violation or understand that it is safe and passable please let me know.
Thank you all very much!
"BY THE TIME I'M 90 I MAY KNOW ENOUGH TO CONSIDER MY SELF AN ELECTRICIAN"
I was wondering if anyone can put this issue to bed for me in direct code reference terms. I have searched the forums and could not find this direct question... Disconnects, fused and non fused. Should the frames be independently bonded with a "lug" or "terminal bar" to the frame even if the disconnect has a bonding bushing located inside of it with the ground properly attached to the bonding bushing lug. And or in a fused disconnect with a bonding screw in place bonding the neutral to the ground. In my opinion, yes, even if the disconnect has a bonding bushing and a bonding screw neu/grd(fused disct) it should also have a mechanical attachment directly to the frame.
I have referenced... 408.40 Grounding of Panelboards. Panelboard cabinets and panelboard frames, if of metal, shall be in physical contact with each other and shall be connected to an equipment grounding conductor. Where the panelboard is used with nonmetallic raceway or cable or where separate equipment grounding conductors are provided, a terminal bar for the equipment grounding conductors shall be secured inside the cabinet. The terminal bar shall be bonded to the cabinet and panelboard frame, if of metal; otherwise it shall be connected to the equipment grounding conductor that is run with the conductors feeding the panelboard.
and then...Panelboard. A single panel or group of panel units designed for assembly in the form of a single panel, including buses and automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a cabinet or cutout box placed in or against a wall, partition, or other support; and accessible only from the front.
I have been always under the impression that a bonding bushing bonds "the conduit to the frame" and the bonding screw bonds the "neutral to ground", none of which I believe are a direct purpose to bonding the frame for the sake of bonding the frame.
If I am wrong on any of these accounts please inform me, if I am correct please inform me as well. Either way anyone who knows a direct code reference to either call out a violation or understand that it is safe and passable please let me know.
Thank you all very much!
"BY THE TIME I'M 90 I MAY KNOW ENOUGH TO CONSIDER MY SELF AN ELECTRICIAN"