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I'm installing a panel with the feed conductors entering via 1-1/2" PVC. Is an end bushing, as shown here (for example), required by the U.S. NEC for PVC?

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From the NEC:

352.46 Bushings. Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection.

The important part is bolded above - you need a bushing unless your fitting provides equivalent protection - that is, equivalent to the protection a bushing provides.

You'll probably terminate your conduit in your panel with either a PVC male terminal adapter:

male terminal adapter

or a PVC box adapter:

box adapter

I think anyone would agree the box adapter provides protection equivalent to a bushing.

I believe it's generally accepted that a PVC male adapter does provide equivalent protection, but you might find someone that disagrees, and some of them are pretty sharp. I usually ream them with lineman's pliers to take the edge off and do without the bushing.

The box adapters make a great connection but since they are cemented on, they are a pain if you have to remove and replace them.

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A bushing is typically NOT required when using PVC conduit. However, for the sake of completeness I always use a bushing...

  • Thanks. Please revise to elaborate on what "completeness" means here. Aesthetics? A personal standard for some purpose? – isherwood Nov 12 '18 at 15:27
  • By completeness I mean I'll do it even if it seems to be or is overkill. This is my personal preference tho. – BillWeckel Nov 12 '18 at 15:37

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