Many trades and occupations now ask that some of their employees are tested for colour blindness. This is particularly important in the electrical and electronic trades where many different colours are used to identify cables. Some training centres will test a new trainee’s ability to differentiate colours when they first begin their training. This can…

COLUMN NUMBERING NOTES When completing a Schedule of Test Results it is important that the correct data is entered into the correct boxes on the schedule. The Schedule of Test results will be used for comparison checks of the circuit in the future, for example at the next Periodic Inspection. It is imperative then that…

The Wiring Regulations inform us that every installation should be inspected and tested during erection and on completion before being put into service, to verify that the requirements of BS7671 have been met. In other words, we should always inspect and test our work before handing it back to the customer. We will focus here…

We are often asked what is an adiabatic formula or equation and indeed what does adiabatic actually mean in relation to electrical installation work. We know it is to do with selecting the correct size earth conductor but how do we use it? And why do we even bother? If we look in the Wiring…