Category	Type of Premises	Type of Equipment Note (1)	User Checks Note (2)	Class I		Class II  Note (4)
				Formal Visual Inspection Note (3)	Combined Inspection and Testing Note (5)	Formal Visual Inspection Note (3)	Combined Inspection and Testing Note (5)
	1	2	3	4	5	6	7
1	Construction sites 110V         } equipment }                  }	S	None	1 month	3 months	1 month	3 months
		IT	None	1 month	3 months	1 month	3 months
		M (#)	weekly	1 month	3 months	1 month	3 months
		P (#)	weekly	1 month	3 months	1 month	3 months
		H (#)	weekly	1 month	3 months	1 month	3 months
2	Industrial premises including commercial kitchens	S	weekly	None	12 months	None	12 months
		IT	weekly	None	12 months	None	12 months
		M	before use	1 month	12 months	3 months	12 months
		P	before use	1 month	6 months	3 months	6 months
		H	before use	1 month	6 months	3 months	6 months
3	Equipment used by the public	S	Note (6)+	1 month	12 months	3 months	12 months
		IT	Note (6)+	1 month	12 months	3 months	12 months
		M	Note (6)+	weekly	6 months	1 month	12 months
		P	Note (6)+	weekly	6 months	1 month	12 months
		H	Note (6)+	weekly	6 months	1 month	12 months
4	Schools	S	weekly+	None	12 months	12 months	48 months
		IT	weekly+	None	12 months	12 months	48 months
		M	weekly+	4 months	12 months	4 months	48 months
		P	weekly+	4 months	12 months	4 months	48 months
		H	before use+	4 months	12 months	4 months	48 months
5	Hotels, guest houses and B & B establishments Note (7)	S	None	24 months	48 months	24 months	None
		IT	None	24 months	48 months	24 months	None
		M	weekly	12 months	24 months	24 months	None
		P	weekly	12 months	24 months	24 months	None
		H	before use	6 months	12 months	6 months	None
6	Offices and shops Note (7)	S	None	24 months	48 months	24 months	None
		IT	None	24 months	48 months	24 months	None
		M	weekly	12 months	24 months	24 months	None
		P	weekly	12 months	24 months	24 months	None
		H	before use	6 months	12 months	6 months	None
(1)	S	Stationary equipment
	IT	Information technology equipment
	M	Moveable equipment
	P	Portable equipment
	H	Hand-held equipment
(2)	User checks are not recorded unless a fault is found.
(3)	The formal visual inspection may form part of the combined inspectionand tests when they coincide, and must be recorded.
(4)	If class of equipment is not known, it must be tested as Class I.
(5)	The results of combined inspections and tests are recorded.
(6)	For some equipment such as childrens's rides a daily check may be necessary.
(7)	If equipment is for use by the public, then adjust the test frequencies as per Category 3 above
(+)	By supervisor/teacher/member of staff.
#	110V earthed centre tapped supply.  230V portable or hand-held equipment must be supplied via a 30mA RCD and inspections and tests carried out more frequently.
The information on suggested initial frequencies given above is more detailed and specific than HSE guidance, but is not considered to be inconsistant with it. Source : IEE Code of Practice for In-service Inspection and Testing of Electrical Equipment.