Title Page
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Step 1 - Select an approved and calibrated test lamp, voltage indicating device or tester.
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Step 2 - Verify that the device is functioning correctly on a known supply or proving unit
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Step 3 - Locate and identify the circuit or equipment to be worked upon
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Is the circuit or equipment in service? (Any equipment seen or known to be currently powered on the circuit)
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Step 4 - Identify the means of isolation
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Step 5 - Ensure isolation of the circuit or equipment by 1- Switching Off, 2- Withdrawing Fuses, 3- Locking off isolation switches or MCBs.
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Step 6 - Verify that the circuit or equipment to be worked upon is dead using a voltage indicating device or tester, testing between 1- All Phases to Earth, 2- All Phases to Neutral, 3- Neutral to Earth
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Discover why with care, go back to Step 4 "Identify means of isolation"
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Fit warning labels
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Re-check that the voltage indicating device or test equipment is functioning correctly on a known supply
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Begin the work
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Replace or repair the test equipment, use a proven unit for the works
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Establish where and why the circuit is dis-energised
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Replace or repair equipment, do not proceed with the equipment until the test equipment is proven ok.
