Bonding Subpanel on a Mobile home

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Alve12

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New York
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Electrician
Hi all, I need your help. A friend of mine is asking me about adding a subpanel from a subpanel on a Mobile home . Do the new subpanel needs to be bonded to the chassis even if the main panel and the sub panel are already bonded? Assuming using a SER 4 wire.
When reading and trying to understand 550.16(c)(1) I would like to know if this applies only to the main panel ?
Thank you
 
I'm thinking it's only required at the main panel in accordance with NEC 250 The chassis should've been tested for continuity at the factory. If this is a two-section home, there should be a jumper somewhere.
550.32 -4 and 545.7
 
Buck Parrish said:
I'm thinking it's only required at the main panel in accordance with NEC 250 The chassis should've been tested for continuity at the factory. If this is a two-section home, there should be a jumper somewhere.
550.32 -4 and 545.7
Click to expand...
Thank you Buck Parrish.
 
Alve12 said:
Hi all, I need your help. A friend of mine is asking me about adding a subpanel from a subpanel on a Mobile home . Do the new subpanel needs to be bonded to the chassis even if the main panel and the sub panel are already bonded? Assuming using a SER 4 wire.
When reading and trying to understand 550.16(c)(1) I would like to know if this applies only to the main panel ?
Thank you
Click to expand...
I' reading it like you. The panelboard is required to be bonded to the chassis via a grounding conductor to an accessible grounding terminal of the chassis. All other metal parts likely to become energized (all other sub panels, for example) only needs to be bonded to the panelboard enclosure or a grounding terminal inside the panelboard enclosure.

I'm not an electrician yet, don't believe anything I say.
 
Sea Nile said:
I' reading it like you. The panelboard is required to be bonded to the chassis via a grounding conductor to an accessible grounding terminal of the chassis. All other metal parts likely to become energized (all other sub panels, for example) only needs to be bonded to the panelboard enclosure or a grounding terminal inside the panelboard enclosure.

I'm not an electrician yet, don't believe anything I say.
Click to expand...
Thank you Sea Nile!
 
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