That about sums it up- especially the bit about getting someone competent/qualified to have a look at it all.
Never a good sign if the lights dip when you fire up a high power device- indicates the cable is undersize for the load. Especially with motors, startup current can be a lot higher than running current.
If you're struggling to get someone you trust to do the work, that Martindale that someone linked to will at least show you whether you have a functioning earth in the garage (or in the rest of the house)
Occasionally prodding the TEST button on the ELCB wouldn't be a bad idea.
Never a good sign if the lights dip when you fire up a high power device- indicates the cable is undersize for the load. Especially with motors, startup current can be a lot higher than running current.
If you're struggling to get someone you trust to do the work, that Martindale that someone linked to will at least show you whether you have a functioning earth in the garage (or in the rest of the house)
Occasionally prodding the TEST button on the ELCB wouldn't be a bad idea.