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maintenance procedures before starting to work;
· use protective gloves;
· open all contacts that bring power to the equipment before measuring resistance values;
· check that there is no high voltage in the low voltage circuits;
· do not use magnetic tools near strong magnetic fields.
20.3.6 SAFETY STANDARDS TO COMPLY WITH DURING MAINTENANCE
If continuous operation is not required, the system must be turned off.
Before beginning work, the following is required:
· check the maintenance person and make sure he is not carrying objects which could
become conductors;
· inspect the work site and make sure the floor is clean an dry;
· inspect work tools. These must be suited for the job to be done and be in good condition
in order to permit safe maintenance;
· measuring instruments must be periodically calibrated;
· check work procedures before starting the job. Check the wiring diagram and get an
overall picture of how the system is structured.
It is necessary, while maintenance is being done:
· for the maintenance person to be aware of which circuits are under high voltage;
· no resistance measurements must be made on live circuits;
· use only one hand when testing live circuits;
· ground the terminals of the instrument before measuring live circuits;
· always strictly comply with the suggestions mentionned above
Maintenance can be held to be terminated when all components have been reinstalled
and the unit has its original appearance.
