Wiki — electrical concepts

Short, plain-language entries on the ideas behind your home wiring. No jargon without an explanation.

All entries

How the NEC works, its 3-year cycle, and why local amendments matter.

The basic units behind load calculations and breaker sizing.

Where ground- and arc-fault protection is typically required and why.

What service size means and what drives an upgrade decision.

How Type 1/2 surge devices differ from point-of-use strips.