Why so rough ar*e?

[bhm1712]

Another example of rough arsed electricians.

Courtesy of GEM solar UK

Not the greatest crime I know but doesn't hurt to do things properly and make amends if you mess something up.

 

[Blackhand]

Assuming the Wylex breaker rammed in is the Solar id be far more concerned about that potentially being fed from the RCD in that board thus potentially raising every circuits disconnection time to 5 seconds.

 

[Adam_151]

Assuming the Wylex breaker rammed in is the Solar id be far more concerned about that potentially being fed from the RCD in that board thus potentially raising every circuits disconnection time to 5 seconds.

Its not so much that the disconnection time is extended to 5secs because given that its a double pole RCD, once it trips the neutral->earth bond is no longer in circuit and therefore for the remainder of the disconnection time of the inverter its electrically separate and therefore no potential to the general mass of the earth. So not as bad in that respect but as it may seem, my concern is more with de-sensitising the RCD. If you have a load of 10A on RCD protected circuits for example (and nothing on none RCD protected circuit--- to make things simple---its a bright day and so the lights arn't on). The inverter is producing 5A (which doesn't have to flow through the RCD, its being produced and used on the load side) and the grid is providing the other 5A. If someone gets a shock from a faulty appliance and 40mA flows to earth... what does the RCD see? .... I did once think it would be 20mA but I think the answer could be worse than that!

Either way, its not an acceptable installation practice, but one that you see time and time again from solar companies