Oct 16, 2023 · For a given column of Table 300.5 ("minimum cover requirements") there is a potential overlap of the various rows. The one that concerns me at present is Column 2 (IMC …

May 5, 2025 · The columns indicate how much amperage is required to raise the temperature of that size conductor to that column's temperature under standardized conditions. So a 2/0 …

Jan 17, 2011 · Now under the 2011 NEC you must or you must label the transformer where the disconnecting means is and it must be lockable. Maybe someone can post the 2011 wording.

Mar 4, 2021 · I've had people tell me that ALL disconnecting means relating to commercial elevators MUST be Heavy Duty Type. My biggest question would be, are the car lighting and …

Apr 13, 2023 · NEC 2017 514.8 Underground Wiring. ENHANCED CONTENT Fuel spilled in the vicinity of gasoline dispensers seeps into the ground and could migrate into underground …

Dec 16, 2014 · Article 100 Definitions In Sight From (Within Sight From, Within Sight). Where this Code specifies that one equipment shall be “in sight from,” “within sight from,” or “within sight …

May 26, 2009 · Question is: There is a 400A breaker in the switchgear feeding a Transformer on the second floor. (480/120-208, 800A) Does there need to be a disconnect switch (non fused) …

Jul 8, 2017 · NEC Article about mixed voltages in conduit Jump to Latest 26K views 11 replies 8 participants last post by wildleg Jul 9, 2017 G

May 13, 2021 · Understanding NEC 2020 and disconnects required 1 reading Jump to Latest 13K views 9 replies 4 participants last post by magicone2571 May 14, 2021

Apr 12, 2010 · I tried doing a search for old threads on this topic and no luck. I read Article 406 and information is not there. Every store that has neon signs in the windows has the …