... code definition
... code definition
(OP)
I'm searching for a code published or industry practice definition for the location term 'pit'. I know the NEC does not offer a definition so the request is for a building code or guidance type document that defines this term. I don't think "... an area often sunken or depressed below the adjacent floor area" provides satisfactory clarity to depth or space (e.g. confined) criteria. I would appreciate any thoughts or opinions forum members have on this matter.
RE: ... code definition
RE: ... code definition
In addition to testing ventilation, high and low scavenging is provided. When Article 511 (Major Repair Garages is closest NEC match for this occupancy) is applied to this space, the question is how far above the lowest horizontal surface requires rated equipment and wiring methods? The 18 in. classified volume is either entirely in the depressed floor or extends to 42 in. (18 +24).
RE: ... code definition
RE: ... code definition
Gasoline vapors are heavier than air, IIRC, hence the concern regarding pits. Diesel fuel would probably not be a concern.
The local AHJ would get the final call, but with gasoline, the hazard is real, so I wouldn't want to try to wordsmith my way out of doing something that probably needs to be done.
RE: ... code definition