Dec 9, 2025 · To be fair, one time, to the NEC, they did give us all a huuuge bonus with their load calc changes. This has to be a first, the code update might actually make installs cheaper?

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 XHHW will …

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 electrical conduits. …

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 and RMC …

Jan 23, 2023 · I know 334.30(B)(1) (quoted below) has been discussed here before, but I haven't seen a satisfying answer to my particular question. I recently had a discussion with an inspector about the …

Branch circuits The distinction between a branch circuit and a feeder can be a source of confusion for the Code user. The first step in eliminating this confusion is to understand that the NEC defines a …

Jul 8, 2017 · What article states that it is not permissible to mix voltages in the same conduit?

Sep 15, 2010 · The K factor isn't specifically stated in the NEC, but wire sizes and their circular mils and resistance are. Using these, you can derive it from the tables in the NEC. For example, Chapter 9, …

Jan 9, 2025 · Does NEC allow running multiple 480V 3 Phase Power load conductors in a single conduit instead of running each 3 phase loads conductors in separate conduits?

Nov 3, 2022 · NEC 422.5 (A), (2) shows that GFI protection is required for drinking water coolers "and bottle fill stations". One inspector is interpreting this to cover drinking water dispensers which use …