electricalpowertoolssafety
I have recently purchased a Makita 2100W angle grinder. It has just the live (L) and neutral (N) connectors unlike the one I previously used, which had a third protected earth (PE) connection.
Would it be better if I changed the connections to a 3 pin connector?
You can use a block connector (you can bridge it - on one side loop a a wire into each terminal to make it like one big connector)
or You can use a twist connector
I was searching for something like this. But an insulated version- i found something in china but the problem is it will never be approved to use that on internal circuits due to high risk of electrical shock. These are used inside distribution boards only - and can only be installed by qualified electricians.
Comments converted to answer.
If the manufacturer says they need a fuse, then I'd probably install a fuse. Just install a 5A fuse before the transformer, and make sure it's accessible in some way.
The light circuit is probably on a fuse/breaker at the service panel, but since you are using a transformer to step down to low voltage a fuse may be required to protect the transformer and low voltage wiring. The fuse/breaker in the main panel will probably be 15-20A; since it's designed to protect a normal line voltage lighting circuit, so you'll need another 5A fuse before the step down transformer to protect the transformer and everything downstream from it.
Best Answer
Your grinder is a Class-II Double Insulated appliance and therefore does not require a ground/earth connection.
But even if you did decide to fit a 3-pin plug, what would you connect the 3rd pin to?
There's no 3rd wire in the cord, nor is there a ground point in the device to connect it to.