Safety

GFCI: Where It Actually Belongs

Iñigo Cruz, Principal Engineer5 min read

Ground fault protection is the least visible safety decision in a home and the one most worth getting right.

The 5 mA threshold

A GFCI device trips on an imbalance of roughly 5 mA between line and neutral — far below the level that causes harm. It protects people, not equipment.

Rooms that need it

Kitchens, bathrooms, laundries, outdoor terraces, pool surrounds and any socket within reach of a sink. In wet-area specification we treat it as mandatory rather than advisory.

Why self-testing matters

A protective device that has silently failed is worse than none. Self-testing units check their own trip circuit periodically and indicate a fault rather than waiting for a monthly button press nobody performs.

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