Page 101 - IGC BOOK

• Firewatcher must be assigned in the hot work area.
• Routine visits after the work to check the area for smouldering.

Working on Electrical Systems

Working on live electrical systems including high voltage systems must be controlled with a permit
to work system to confirm that all precautions are in place. Work with non -live electrical system
is often subject to permit-to-work control in order to ensure that electrical systems are fully de-
energised and isolated with LOTO.

Electrical permit system is used to ensure that

• Working with live electricity is justified (if it is not possible to operate with the power off)
• All precautions have been put in place
• The workers are competent to carry out the task.

Machinery Maintenance

Machinery maintenance requires removal of guards or disabling control systems(e.g. sensors), it
also requires more workers to involve in the work at the same time, involves many risks from
energy sources, dangerous rotating parts of the machinery or being trapped inside the plant. The
risks are best controlled with established permit to work system.

The permit ensures that

• All workers are competent to carry out the maintenance work.
• The work is carefully planned.
• Power sources are isolated and locked off.
• Release of stored energy – hydraulic or kinetic energy.

Confined Spaces

By virtue of its enclosed nature, frequent access in to
confined space are extremely dangerous, this must be
controlled with permit to work system. This requires
the employer to carryout a suitable and sufficient risk
assessment to manage risks to workers and others.
The risk assessment will help identify the necessary
precautions and emergency arrangements to be
included in the safe system of work.

ENSIGN| Unit IG1 – Element 3 – Managing Risks – Understanding People and Processes 56