Installation electrician - installing power systems, lighting, fire protection, security and data-network systems in all types of buildings Maintenance electrician - checking systems regularly to make sure that they are working efficiently and safely Electro technical panel builders - building and installing control panels that operate the electrical systems inside buildings Machine repair and rewind electrician - repairing and maintaining electrical motors and other machinery like transformers to make sure that they work correctly Highway systems electrician - installing and maintaining street lighting and traffic management systems that tell the public what they need to know when they’re on the roads and motorways. Service panel, panel components, circuit breakers, fuses