Affordable PAT Testing in Glasgow. Top Spark Electrical perform comprehensive electrical safety tests on plug top and fixed wired appliances. As NICEIC Registered electricians we offer quality PAT Testing services in Glasgow you can trust. The frequency of portable appliance testing is determined by several factors. This includes the type of equipment and its classification, the frequency it is used and/or moved and the environment in which it is operating. Our PAT Testing Engineers will specify your exact requirements. We use the IET Code of Practice for In-service Inspection and Testing of Electrical Equipment 4th Edition guidelines to help determine this.