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Use and maintenance instruction manual
Chap. 2
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2.16.6
Residual risks during work on the electrical system
2.16.6.1 Work on the electrical system – (Risk ID: 09.01)
IDENTIFICATION
RISK ASSESSMENT
Stage:
Maintenance
Person:
Maintenance personnel
Area:
Z01 Electrical equipment
Initial risk:
HIGH
RESIDUAL RISK:
MEDIUM
PLr (EN 13849):
-
SIL (EN IEC 62061):
-
ACCIDENT SCENARIO
Consequence:
2.4 Electrocution
Situation:
Maintenance on the electrical system (inspection, adjustment, substitutions).
Event:
Risk of electrocution from direct and indirect contact with live parts.
Body part:
Entire body.
RESIDUAL RISK
Risk of electrocutiion from direct and indirect contact with live parts.
LIMITATION MEASURES
Mechanical:
- Create/install containers and sheaths capable of guarantying adequate insulation
of live parts (SAFETY MEASURE Q03).
- Wiring of electrical instruments in compliance with CEI EN 60204-1 standards
(SAFETY MEASURE Q03).
- Electrical cabinet doors may be opened only with a key entrusted to maintenance
personnel (SAFETY MEASURE Q02).
- The door to the electrical cabinet cannot be opened when the switch is in the ON
position.
Electrical:
-
Informative:
- Work on the electrical instruments, be they powered or not, may be carried out
only by expert personnel (EXP) and informed persons (INFP), as per the definition
provided for in CEI 11-27. CEI EN 60204-1 standards do not differ between work
carried out on electrical instruments that are not power and those that are live,
therefore not obligatorily requiring that the latter be carried out by Competent
Persons (COP) as per the definition provided for in CEI 11-27.
- Work on live equipment carried out inside the electrical board may be performed
only after having cut off power, having opened the board door, and having newly
powered the equipment by purposely turning the main switch to ON.
Symbols:
- Electrocution warning sticker on boards and boxes containing live parts
(WARNING PE01)
- Do not enter prohibition sticker for unauthorised personnel on electrical boards
and boxes that consent access to live parts with the entire mbody (WARNING
AD01)
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