1. BS 5501-2:1977. Electrical apparatus for potentially explosive atmospheres - Part 2: Oil immersion “o”

2. BS 5501-4:1977 EN 50 017. Electrical apparatus for potentially explosive atmospheres - Part 4: Powder filling “q”

3. BS 5501-8:1988 . Electrical apparatus for potentially explosive atmospheres - Part 8: Encapsulation “m”

4. BS 5501-9:1982. Electrical apparatus for potentially explosive atmospheres - Part 9: Specification for intrinsically safe electrical systems “i”

5. BS 5507-1:1977. Methods of test for Falsework equipment - Part 1: Floor centres

6. BS 5507-3:1982. Methods of test for Falsework equipment - Part 3: Props

7. BS 5514-3:1990 ISO 3046-3:1989. Reciprocating internal combustion engines Performance - Part 3: Specification for test measurements

8. BS 5514-4:1997 ISO 3046-4:1997. Reciprocating internal combustion engines - Part 4: Speed governing

9. BS 5514-6:1992 ISO 3046-6:1990. Reciprocating internal combustion engines Performance - Parts 6: Specification for overspeed protection

10. BS 5516-1:2004. Patent glazing and sloping glazing for buildings - Part 1: Code of practice for design and installation of sloping and vertical patent glazing