Design – Cable Management System Overview

Mechanical Loading
All Cable Clip are tested for lateral and vertical loads to ensure they can support the weight of the cable.

Short Circuit Current Rating – kA Peak Current or r.m.s
What is the maximum peak fault current (kA) that will flow through the cable in the event of a short circuit? Based on the short circuit current rating, the maximum repulsive force that the cable clamp will need to withstand in the event of a short circuit fault can be calculated using IEC 61914.

Cable Layout – Flat/Side by Side or Triangular?
The cable layout determines the type of cable clamp; either a single core cable clamp, triangular cable clamp, quadrilateral cable clamp, or a custom cable clamp that will be designed, tested and certified based on the requirements provided to CMP Products by the customer.

Cable Extension Length – How many cable clamps are required?
The spacing of the cables will be determined based on the cable arrangement, cable diameter and short circuit current rating, and the exact number of cable clamps to be used is calculated based on the length of the cable run. At 90° bends in the cable, it is important to note that the spacing of the cable clamps across these bends will be reduced. For more information on installing cable clamps through bends, see page 54.

Expansion
Single-core cables expand and contract more significantly than multi-core cables due to temperature changes. If the cable is restrained, considerable forces are transferred to the supporting structure. With this in mind, single-core cables are often bent to form small loops to compensate for expansion and contraction. It is also common to allow some cable clamps to move freely rather than fixing all of them in place.