Across
- 3. steel conduit is this type of conductive part
- 5. colours identifying a protective conductor
- 6. this conductor can link an 'exposed conductive part' to an 'extraneous conductive part'
- 7. the ....... test spike is installed the furthest from an earth electrode under test
- 8. this type of equation means 'impassable to heat'
- 9. this conductor connects an 'exposed conductive part' to the M.E.T
- 11. By convention we take earth to be at this voltage
- 12. type of earth electrode
- 13. earthing system that utilises a PEN conductor
- 14. this conductor links the M.E.T to the earth electrode in a T.T system
Down
- 1. this type of conductive part is not part of the electrical installation however could introduce earth potential
- 2. this conductor links incoming services to the M.E.T
- 4. Earth and neutral are connected here
- 10. For current to flow a ....... must exist