Posted By Philby' as the cabin, and associated equipment, eg kettles, fridges etc are moved about, subject to the element and abuse by users....every time its moved and, if static for any length of time, every 6 mths if its used for high use, 12 mths otherwise...this was just what was recommended when we had a hygiene unit on site (toilet/shower/fridge/microwave and kettle)

Posted By David Rodger There are two distinct points to consider here. The portable electrical appliances within the cabin and the fixed electrical installation of the cabin itself. The frequency of the fixed installation will be covered under BS 7671 (IEE wiring regulations) from memory (but don't quote me) I think it is every 3 months for temporary installations. There should be a sticker on the incoming supply stating when the next test is due. The portable appliances (if only used within the cabin) should be as per normal HSE guidance. Hope this helps

Posted By David Rodger Yes the cabin should be tested every time it is moved as this would constitute a new installation. BS7671 states that every new electrical installation shall be tested or if alterations are carried out to that installation. It also states quite clearly in the guidance tables that the frequency for temporary installations is 3 months not annually.