MEM18049 — Disconnect/reconnect fixed wired equipment up to 1000 volts a.c./1500 volts d.c.

Elements & performance criteria

Performance evidence

• following work instructions, standard operating procedures (SOPs) and safe work practices
• identifying and interpreting specifications, charts, lists, circuit drawings, schematics, regulatory and legislative requirements to disconnect/reconnect fixed wired equipment up to 1000 volts a.c./1500 volts d.c.
• checking that the electrical equipment is isolated and tagged where necessary in strict accordance with work health and safety (WHS) requirements and procedures using appropriate lock-off equipment and tags/signs
• disconnecting equipment by labelling and recording conductors and making safe disconnected cables/connections using appropriate tools, test equipment, procedures and techniques
• confirming isolation prior to reconnecting fixed wired equipment and checking connections and preparing conductors for termination in accordance with manufacturers’ specifications and regulatory requirements
• connecting conductors to equipment and fasten/seal cables/wires/conduits using appropriate procedures and tools to relevant specifications and regulatory requirements
• testing terminated cables to ensure continuity and insulation resistance and complying with following requirements: checking continuity of the protective earth conductor to determine whether it is sufficiently low; testing the resistance between the protective earth conductor and the neutral conductor to determine whether it is sufficiently low – not greater than 2 Ohms; testing the insulation resistance of active conductors to confirm that it is greater than 1 Megohm
• removing all lock-off devices and signage and checking/testing equipment and circuits for compliance to specifications
• rescuing/recovering of injured person in accordance with appropriate standards/procedures and providing first aid, where appropriate, including contacting the appropriate medical and rescue authorities
• recording details of first aid given.

Knowledge evidence

• safe work practices and procedures and use of personal protective equipment (PPE)
• basic knowledge of electrical theory for the operation of the circuit/equipment
• relevant regulatory requirements
• procedures for: determining and recording equipment characteristics; proving and removing electrical isolation; labelling conductors and recording conductor layout; disconnecting conductors and terminating disconnected cables/connections; terminating conductors and checking connections and specifications that apply; connecting conductors to equipment; fastening and sealing the cables, wires and conduits and tools, techniques and equipment to be used; checking and testing the compliance of the equipment with specifications and tools, techniques and equipment to be used; recording first aid
• tools, techniques and equipment required to determine equipment characteristics, prove electrical isolation and disconnect/reconnect and terminate conductors
• point(s) of isolation for the fixed wired equipment and reasons for selecting the chosen isolation point(s)
• safe isolation and proving dead
• range of isolation procedures for the fixed wired equipment
• lock-off equipment and signs to be used and reasons for using and procedures for lock-off equipment and signage
• characteristics of the circuit and the equipment
• operational specifications of the fixed wired equipment
• points of danger to the injured person or potential rescuer
• recognised procedures for the movement and treatment of the injured person, including safe rescue of victim from a live situation, clearing of airways, care of spinal injuries, treatment of cuts/lesions, burns/scalds and treatment of shock
• appropriate local medical and rescue services.

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Questions about assessing MEM18049