In my last article/blog, I spoke of the things that line workers and electricians should do to stay out of court and goal. In this article I look at the things that electricians should do if they want to go home at the end of the day to their loved ones:
1. ALWAYS work de-energised – working ‘live’ is life threatening and against the law. It is just not worth your life. Schedule work when it can be de-energised.
2. ALWAYS Lock Out/Tag Out – make sure you lock out and tag out the right isolation device using proper lock out devices. Never use insulation tape over the device.
3. TEST before touching – always prove what you are about to touch is de-energised. Using a proximity tester first is a good idea, followed by a multimeter. Prove both test instruments before and after no-go tests using a known source or a proving unit. Testing de-energised is regarded as ‘live’ work and therefore requires extensive controls including the right arc flash rated PPE.
4. DON’T test live e.g. taking voltage readings – what was once OK, but is no longer so. Options to minimise the risks include connecting the test instrument whilst the circuit is de-energised, turning on for the test and then turning off to disconnect the test equipment. Permanently mounted test equipment is best.
5. DON’T defeat isolator handle interlocks – doing so will breach WHS legal requirements. Isolator handle interlocks are a safety device that should only be used if the isolator can’t be opened because of a mechanical reason e.g. the contacts have welded shut.
6. DON’T remove Perspex covers with the supply on – these covers have been installed for your safety. Don’t remove them or you are again defeating a safety feature and are likely to be breaking WHS laws.
7. DON’T remove sub-board escutcheon panels with the supply on – this is regarded as ‘live’ work and against WHS laws.
8. ISOLATE the electricity supply before entering roof spaces – this is a legal requirement in WA. Dale Kennedy was a 3rd year apprentice when he was electrocuted in the roof space at a school in Cairns. They had asked to turned the power off but were refused at that time. The work should have been rescheduled.
9. CARRY OUT de-energised testing first when fault finding – this is basically a legal requirement but also sensible if you want to go home at the end of the working day.
10. NEVER CLOSE miniature or moulded case circuit breakers after a short circuit at rated short circuit current without knowledge of the C/B’s condition – these circuit breakers are good for 3 trips at rated short-circuit current.
