NEC wet location.

Rjryan said:
You did not indicate what type of wall the panel is mounted on. If it were a concrete wall in direct contact with earth ( Definition Location, Wet NEC 2023 Handbook ) Then 404.4(A) Damp or Wet locations Surface-Mounted Switch or Circuit Breaker: “ A surfaced-mounted switch or circuit breaker shall be enclosed in a weatherproof enclosure or cabinet that complies with 312.2.” Because the advice you have been getting is correct there is no specific code references between the hot water tank other than panel clearances, which you have met. And no rules about slop sink other than panel clearances which you have met.
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It should have read from the 2023 NEC In concrete slabs or masonry in direct contact with earth.
I apologize for not quoting the complete definition of the wet location ( had nothing to do with any explanation in the Handbook just listed my source ).
 
The drama continues.....after he acquiesce about this not being in a wet location, how he say that there is potential splashing from the mop sink so he want the panels rated. He say electrical panel located within 6 feet of the mop sink needs to be rated?? When I asked where in the code that say that, the best he could have came up with is the GFCI receptacle located within 6 feet of a sink. This guy is crazy!!!!
 
rcfoolinca said:
According to the NEMA definition, only type 2 and up is protected against light splashing.
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My mistake, I must have been looking at outdated charts.

If your panel is UL Listed you should be looking at their definitions in UL50. They are slightly different than NEMA 250.
You are correct, you need a panel in a NEMA Type 2 enclosure, which nobody makes.
But reading a chart of UL types, they do not show Type 3R as protecting against splashing. You need a Type 12 or Type 4.

What about the receptacles and switches, do they need to be rated for splashing?
 
jim dungar said:
My mistake, I must have been looking at outdated charts.

If your panel is UL Listed you should be looking at their definitions in UL50. They are slightly different than NEMA 250.
You are correct, you need a panel in a NEMA Type 2 enclosure, which nobody makes.
But reading a chart of UL types, they do not show Type 3R as protecting against splashing. You need a Type 12 or Type 4.

What about the receptacles and switches, do they need to be rated for splashing?
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Apparently not. The guy said GFCI protection is adequate for receptacles (huh) and said nothing about switches.
 
rcfoolinca said:
How is rain not as a bad as water splashing? Especially hit the panel directly?
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All of these tests have some stuff in common but other parts are specifically different.

Rain proof has to do with water falling and blowing from above, up to 15° off vertical, and puddles on the top of the enclosure. Splashing has to do with water coming up from below.

But even Type 1 enclosures are tested against some moisture contact. This is from AI concerning the water ingress testing of UL50 Type 1 enclosures.
  1. Water Spray Test:
    • Use a water spray nozzle that produces a fine mist.
    • The enclosure should be subjected to water spray at a specified pressure (typically around 30 psi) for a duration of 5 minutes.
    • The spray should cover all surfaces of the enclosure, including seams and joints.
 
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