The earth pin in a plug has a longer arm than the other two. When inserted into a socket it opens an internal guard that prevent little fingers going exploring!
P1 Fuse
Specification reference
Learning outcomes
To explain how the earth wire, together with the fuse provides protection for the user and appliance..
Higher tier only: To describe the advantages of a residual circuit breaker.
Keywords
Earth wire - fuse - RCCB.
Syllabus
Specification reference
