Cable Size and Current Clamp Guide

Cable Size and Current Clamp Guide

Cable Sizes

Cable sizes are typically specified by their cross-sectional area, given in square millimetres (mm²) — though it’s often abbreviated simply as “mm.” This cross-sectional area is usually printed on the cable itself and determines the electrical performance (such as current-carrying capacity and resistance).

For example, a “50mm cable” almost always refers to 50mm².
In some regions, particularly in North America, cable sizes may be given using the American Wire Gauge (AWG) system.

Cable Outer Diameter and Current Clamp Selection

While the cross-sectional area relates to electrical capacity, the outer diameter of a cable determines the physical fit within enee.io current clamps.
Each current clamp has a maximum cable diameter it can accommodate — shown in its product code (for example, eCOMP-100/16 fits cables up to 16mm diameter).

The table below provides typical outer diameters for a range of cable sizes, both unarmoured and armoured types.

Example – 50mm² Cable

Using the table below:

  • A 50mm² unarmoured cable typically has an outer diameter of 13 – 14.5mm.
    → Suitable clamp: eCOMP-100/16 (max 16mm diameter)

  • A 50mm² armoured cable typically has an outer diameter of 22 – 26mm.
    → Suitable clamp: eCOMP-600/36 (max 36mm diameter)

Notes

  • Most on-site distribution cables are unarmoured, as they are run internally or within protective conduit.

  • Armoured cables are more commonly used for underground or external runs, such as from the grid connection point.

enee.io Cable Clamp Refs and sizes


Cable Sizes, Outer Diameters, and Suitable eCOMP-AC Clamps


Notes

  • Unarmoured cables up to 24 mm diameter → typically use eCOMP-AC400/24.

  • Armoured or large supply cables → use eCOMP-AC600/36 or eCOMP-AC1000/52 depending on measured outer diameter.

  • Always verify the actual cable diameter on-site — different manufacturers’ insulation and armour thicknesses may vary.

  • For tighter or crowded installations, consider clamp body clearance when selecting a model.


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