Cable Cleat Nut Spacer

Industry-wide, a fully threaded cleat closure bolt is commonly used as standard to ensure that cable cleats can accommodate a range of cable diameters. However, this can lead to cable damage during high short-circuit fault conditions.

For Quad and Trefoil cable cleat variants that are designed to withstand extremely high short-circuit fault currents of 150 kA or above, CMP supplies the nut spacer as standard. The nut spacer ensures that the cables never come into contact with the threaded portion of the cleat closure bolt during high short-circuit fault conditions.

CMP has conducted over 300 short-circuit tests on its cable cleat range, where at high peak fault currents, tremendous forces are generated. During such faults, the cables dynamically expel away from each other and attempt to break free from the cable cleat restraining them. If any sharp edges, such as exposed threads, contact the cable insulation during these events, damage to the insulation may occur. Depending on the peak fault level, this damage can be catastrophic. If the cable insulation is sufficiently compromised, earth faults may develop, leading to life-threatening conditions for personnel in the vicinity.

The CMP spacer and bolt combination – one size fits all

CMP Products’ Quad and Trefoil cable cleat variants, which are designed to withstand extremely high short-circuit fault currents, use a partially threaded bolt in conjunction with a nut spacer. This combination protects the cable insulation from the sharp threads of the bolt. Additionally, the use of polymeric cable cleat liners ensures that the cables only ever come into contact with smooth or flat surfaces.

The cable cleat can accept a range of cable diameters