This is to determine if a 10 foot distance to the propane tank fill port is required.

NFPA 58 definition of ignition source


  • Fantastic. I see a nice spark everytime I plug in my popcorn popper. Sep 9, 2020 at 21:10
  • I get that - but there are some key nuances in the code - 10 foot from fill port if it is an ignition source - where the code implies that's things like a A/C compressor motor or a direct vent intake / exhaust. By itself, an outlet sitting there is not an ignition source. No diagram I can find references an outlet.
    – House DiY
    Sep 9, 2020 at 22:35
  • @HouseDiY -- how big is the propane tank in question? Sep 10, 2020 at 1:00
  • Propane tank is 1000 gal.
    – House DiY
    Sep 10, 2020 at 1:29

1 Answer 1


This doesn't apply to you, but...

As of the 2017 edition (with no sign of changes in 2020), NFPA 58 Table sets a 15' (not 10'!) distance between unclassified (ordinary location/non-ignitionproof) electrical equipment and the filling ports of containers over 1000lb water capacity. However, NFPA 58 waives that requirement for commercial and residential installations: The provisions of shall not apply to fixed electrical equipment at residential or commercial installations of LP-Gas systems or to systems covered by Section 6.26.

Personally, though, I would keep receptacles out of the 15' radius around the fill port anyway; this is a mitigation against the risk of someone plugging in unrated portable electrical equipment that could serve as an ignition source in its own right, though.

  • ThreePhaseEel, thanks. My read of 'fixed electrical equipment' would be a lamp socket hardwired, no switch. Or even better hardwired LED light, no socket, no way to spark, Is there a broader read to receptacles and might you have a reference?
    – House DiY
    Sep 10, 2020 at 1:33
  • @HouseDiY -- the actual receptacle is fixed, no? (unless it's on a pendant, that is) Sep 10, 2020 at 2:36

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