Electrical Continuity

Electrical continuity and earthing

The standard EN 61537 establishes that for cable ladders with electrical continuity characteristics (metal), this continuity should be guaranteed by means of an equipotential connection and one or several connections to earth in accordance with the use of the ladder system.

The impedance must not exceed:

- 50 mΩ through the joint.

- 5 mΩ x metre of cable ladders.(*)

(*) Currently this valour is studied through document IEC/SC23A/WG12, CLC/TC213/WG-5 – 765. It will be changed to 50 mΩ x metre.

The metre length and joining systems for the different sections that Wibe Group has, as well as the joints of the different accessories supplied, comply with the electrical continuity test established in the afore-mentioned standard, guaranteeing the impedance established. To guarantee these impedance values tightening torque values of no less than 5 Nm are recommended, always using the joins recommended for each ladder type, and taking sizes into account.

To guarantee a safe installation, Wibe Group recommends a proper earthing of all the elements that make up the system (sections and accessories), using the accessories designed specifically for this purpose.

Ensure that all connections are well fixed and proper values are matching according to local legislation

WIBE GROUP RECOMMENDS NOT TO USE THE LADDER AS EARTH OR NEUTRAL CONDUCTORS. MILTON IS NOT RESPONSIBLE FOR ANY DAMAGE IF YOU USE ACCESSORIES FROM OTHER MANUFACTURERS.