It is well known, it is better to prevent than cure, and this saying is also valid for the domestic electrical installation. Here are some tips by Mister Sparky Electricians MA for preventive electrical maintenance of your electrical installation:
Before proceeding with any intervention:
- Get some insulated tools (insulated electrician’s screwdriver and insulated pliers)
- Turn off the power at the service breaker
- Always check for lack of voltage at the place where you will be working
These precautions are valid at all stages of electrical maintenance:
At the Electrical Panel
It is at this level that it will be necessary to pay attention to; the electrical panel being the brain of the installation, it is often at the level of the general box that the breakdowns appear. The now preventive electric will be activated first to avoid breakdowns:
Tightening Connections in the Electrical Panel
This is the number 1 problem in electrical panels: The bad tightening is responsible for electrical failures or sometimes more serious, starting fire.
But, how is it that the screws of circuit breakers or differential switches loosen? This is because of the micro-vibrations caused by the passage of the alternating current.
Upstream and Downstream of the Electrical Protections
This is to control that the electrical wires are well held in the terminals of the differential switches and the division circuit breakers.
It must also be checked that the horizontal combs (and vertical if they exist) are tight in the housing of the circuit breakers.
With the screwdriver (isolated I repeat) it is sufficient to check the tightness of each terminal; You will quickly identify if the connection is not clear, the screw must be tight and there must be no play.
Insulated Screwdriver Preventive Electrical Maintenance
The insulated screwdriver will be mandatory to control the tightenings in the electrical panel
At the electrical terminal blocks:
In the context of preventive electrical maintenance, it is also necessary to check the power supply terminals of the electrical panel (in the case where they are used, it is possible that the power supply arrives at the upstream terminals of the differential switch – see all the information on the connections in the electrical panel)
Differential Switch Test
This is a mandatory test to be done regularly (it is also requested by the manufacturers of electrical equipment, it is written in the instructions of electrical equipment )
The differential switch has a test button that makes it possible to check that it triggers at the right threshold (30mA).
Test Button Differential Switch
To test the differential switch, use the test button provided for this purpose
When you perform this test, the entire line of circuit breakers that depends on the differential switch is disconnected, so be sure to turn off all equipment connected to these electrical circuits before testing.