Cable size tables

If you are struggling to work out the conductor cross-section of your old cable, we recommend looking for any markings on the outer insulation. These might be a number followed by mm² or AWG. If the conductor cross-section is specified in AWG then you can use the first table below to find the equivalent metric cable size in mm².

If there are no markings on your cable, please see the subsequent tables below that may help estimate your cable's conductor cross-section based on the overall diameter (including insulation) in comparison with the cable that we stock.

Conversion between AWG (American Wire Gauge) and mm²

Thin Wall Single Core Cable - Conductor cross-section versus overall cable diameter

Please note - These measurements are based on our cable manufacturer's specifications and other manufacturers may differ. Maximum overall cable diameter is based on the measurement across the insulation and is a rough guide

Extra Flexible PVC Battery Cable - Conductor cross-section versus overall cable diameter

Please note - These measurements are based on our cable manufacturer's specifications and other manufacturers may differ. Maximum overall cable diameter is based on the measurement across the insulation and is a rough guide

Disclaimer - The information contained in these articles is provided in good faith and we do our best to ensure that it is accurate and up to date, however, we cannot be held responsible for any damage or loss arising from the use or mis-use of this information or from any errors or omissions. The installer is ultimately responsible for the safety of the system so if you are in any doubt, please consult a qualified electrician.