Guides

Electrical guides

Explanations of low-voltage installation topics such as voltage drop, cable sizing and protection, written for engineers, electricians and informed owners.

The guides below pair with the electrical calculators: the guide explains the physics and the standard, the tool does the arithmetic.

How voltage drop works

Why voltage falls along a cable, how to calculate it for DC, single-phase and three-phase circuits, what limits the common standards set, and what happens to equipment when the drop is too large.

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