Across
- 3. Tells others about safe isolation
- 4. The number of single phase tests
- 5. unit What is used to prove the test equipment
- 6. Fits onto main switch or circuit breaker
- 8. What we switch off if only one circuit isolated
- 9. The number of three phase tests
Down
- 1. The switch we most often switch off for isolation
- 2. Securely isolates from live supply
- 5. Makes isolation secure
- 7. Keeps public away