My background is mostly in the electronics side of things. I worked in telecoms (telephone, TV, telex etc.) and still do service work and freelance work for tech. publishers.

I do basic electrical wiring work on a part-time basis as and when it crops up; probably only about 25% of my working time.

It's almost entirely residential, with an occasional light commercial job such as a small store or similar (just finished a job at a local pub).