NEN 1010 §411.3.1.2
Equipotential bonding
Equipotentiaalverbinding
Also known as: equipotentiaal, bonding, potentiaalvereffening, hoofdbonding, supplementaire-bonding, aanvullende-bonding
Conductive connection between all accessible metal parts (gas, water, heating, structural steel) to each other and the HAR to prevent touch voltage in case of fault.
Practical example
Equipotential bonding. In a bathroom, the metal water pipe, the central heating pipe, and the steel frame of the shower cabin are all connected with a 4 mm² conductor to the main earthing rail.
Common mistake
Equipotential bonding. Common mistake: Overlooking plastic conduit parts (e.g., PVC coupling), causing an invisible break in the equipotential bonding.
See also
Related terms
In-depth guides
- → Earthing and earthing systems (TN, TT, IT)
- → §411.3.1.2 Main equipotential bonding — which extraneous-conductive-parts must be connected (§411.3.1.2)
- → §423 (IEC 60364-4-42) §423 — Protection against burns: maximum accessible surface temperatures (Table 42.1)
- → §433 Overload protection (§433) — the coordination rule Ib ≤ In ≤ Iz and I₂ ≤ 1.45 Iz
- → §526 (IEC 60364-5-52) §526 — Electrical connections: why a loose terminal is the most common cause of electrical fire
- → §560 Emergency & Escape Route Lighting — §560
- → §705 Livestock buildings and agricultural premises (§705) — earth potential in livestock-accessible zones
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