How to Work Around the Obsolete BS 6724 Electrical Installation Cable Selection Guide

The BS 6724 electrical installation cable selection guide was an important document that helped electrical contractors, electricians, and electrical engineers select the appropriate cables for installations in the UK. However, this guide is now obsolete and no longer used. As an electrical professional, I've learned effective strategies to work around this obsolete standard and properly select cables in its absence.

What Was BS 6724 and Why Is It Obsolete?

BS 6724 was a specification published by the British Standards Institution (BSI) that provided recommendations for selecting cables in electrical installations operating at voltages up to 600 V a.c. It aimed to help professionals choose the right cables based on factors like operating voltage, environmental conditions, diversity, and more.

However, BS 6724 was withdrawn and declared obsolete in 2014. The standard became outdated as cable insulation technology and testing methods improved. Its cable current carrying capacity tables were no longer accurate. As a result, the guide could not address modern cable types properly.

Key Factors to Consider For Cable Selection Without BS 6724

Since BS 6724 is obsolete, I now rely on a range of other factors and resources when selecting cables, including:

Cable Parameters

Installation Considerations

Relevant Standards and Resources

Good Practices for Cable Selection Without BS 6724

Based on experience, here are some good practices I follow to select appropriate cables:

Key Takeaways When Working Without BS 6724

The obsolete BS 6724 standard made cable selection straightforward. Without it, the process requires more care and effort. The key lessons I've learned are:

Although selecting cables is harder without BS 6724, it can be done effectively using good engineering practices. Careful design analysis, research, modelling tools, safety factors and field verification enable making optimal cable choices.