Insulation resistance testing electric showers and the installation wiring , tripping electricity fuse circuit breaker

Is your electric shower tripping the electricity, MCB circuit breaker or RCD then it could be a break down of of the insulations resistance here i test the heating element to ensure its safe to use.

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Need a Multimeter for testing try on Ebay UK here

**Any insulation resistance testing is made on isolated dead equipment 

If the insulation breaker down on your electric shower wiring or the element itself internally it can cause your MCB to trip but more likely before that the RCD to trip. Its not only a good idea to test the electrical installations insulation resistance values but its the law on any new installation or even when replacing an existing shower for a new one. it makes sense to do similar on the shower itself BUT only to the element as an insulation resistance use 250 or 500v to test, this can damage more sensitive electrical items and completely destroy electronics.

Testing between terminal and case result =  >500 Mohms 

other side of element then repeat on lower element again very high reading 

Below i showing you a 0.00 ohms failure reading 

The test itself is very easy connect one end of leads to the electrical terminal of the element and the other to the body of the unit itself then press test , do this to both side if the element and to both elements of the shower heater. The result should be high Mohms if its lower 10 Mohms then you have an issue somewhere. The resistance of the insulation is breaking down and you need to rewire or buy  new element.

Below is a video of testing the insulation resistance of element

And below the video shows insulation resistance testing shower motor that was tripping the electric.

above shows 120 Mohm a good enough reading but below is less than 1 Mohm so dangerous 

This shows importance of testing motors and heating elements for both continuity/resistance and insulation resistance values as this motor was tripping the electric MCB but it tests good on ohms reading but fails on insulation resistance testing

testing the installation video to follow ( TBC )

Here is insulation resistance testing on on  a cooker wire install for now