Electrical Safety Flashcards
7 cards from real CITB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Safety flashcards as text
What is the purpose of Portable Appliance Testing (PAT)?
Answer: To verify that portable electrical equipment is safe to use
PAT testing checks that portable electrical equipment is safe to use and identifies faults before they can cause injury or fire.
What colour label typically indicates that electrical equipment has passed a PAT test?
Answer: Green
A green label indicates the equipment has passed PAT testing and is safe to use; a red label means it has failed and must not be used.
Underground cables must always be treated as live unless:
Answer: They have been isolated and proved dead by a competent person
Underground cables must be assumed live until a competent person has safely isolated the supply and proved the cables are dead using appropriate test equipment.
What tool should be used to locate buried electrical cables before excavating?
Answer: A Cable Avoidance Tool (CAT)
A Cable Avoidance Tool (CAT), used with a signal generator (Genny), detects buried cables and pipes to reduce the risk of striking them during excavation.
What should you do if you accidentally strike an underground cable during excavation?
Answer: Treat it as live, warn others, and contact emergency services and the cable owner
Striking an underground cable is an emergency — treat it as live, keep everyone away, and immediately call the emergency services and cable owner.
What is the purpose of a 'permit to work' for electrical activities on a construction site?
Answer: It is a formal document that controls high-risk electrical work and ensures safe isolation
A permit to work is a formal documented procedure that controls high-risk activities such as electrical work, ensuring proper isolation and authorisation before work starts.
When must electrical isolation be carried out on a construction site?
Answer: Before any maintenance or repair work is carried out on electrical equipment
Electrical isolation must be carried out before any maintenance or repair work to prevent accidental energisation and the risk of electric shock.