Hi ,to the members in the forum. I would like some advice in the following matters.

1 How does one deal with the fact that , quite a number of light switches, and 220v led downlighters with built in electronics . Are contstucted of plastic , and have no earthing points. Do we simply run the earth point to the junction box and terminate ,or connect to the wall box if metal.

2 I have to make provision for two eco ovens that have been purchased, they have a max rating of 2.5kw each
And are already wired for connection to standard 3 pin plug for connection to 15 amp. How would you suggest this gets wired and would you use a circuit breaker for each oven

3 What would be the recommended number of 15 amp socket outlets per circuit breaker .