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Simulated workplace
Scenario · Underground Cables

Repair a low voltage underground cable fault and restore supply

You are a Cable Jointer authorised for low voltage polymeric cable in Underground Cables.

Intermediate3 to 4 hours8 tasks
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The situation

What has happened

A low voltage cable fault between pillars P-2231 and P-2232 in Albert Street, Sebastopol, work order WO-26-4402, has left six customers off supply since yesterday. The fault has been located 42 metres from P-2231 by pulse echo and the excavation is open, 1.2 metres deep, with a gas main marked within 500 millimetres on one side. Electrical access authority EAA-26-2204 is held by the Underground Cables Manager with earths E-14 and E-15 applied, and switching program SP-26-0918 has restoration steps 7 to 12 pending. The pillar P-2231 has heat damaged fuse carriers. The pit rescue kit is on site and the weather is fine.

Your brief. Confirm the excavation and the access are safe, cut out the faulted section and install a straight joint on the low voltage polymeric cable to the client standard, test the repaired cable, and coordinate with the network controller to remove earths and restore supply through the switching program, recording every step on the work order and in the registers.
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Tasks

Deliverables

  • Completed job risk assessment for the excavation and pit rescue
  • Work order entry with joint details and test results
  • Asset inspection register entry for pillar P-2231
  • Switching program register execution notes for restoration steps
  • Updated access and permit register entry showing cancellation

Documents to use

Systems to use

Work Orders and Crew Allocation

Records every planned and reactive job on the networks with the client, apparatus, allocated crew, access requirements, hours worked and completion status.

Access Authority and Permit Register

The operations centre record of every access authority, vicinity authority, test permit and rail traction access requested, issued and cancelled, with the isolation and earthing state confirmed.

Switching Program Register

Records every distribution, substation and rail traction switching program from writing through validation, direction and completion, with the writer, checker, controller and each step's confirmation.

Pole and Asset Inspection Register

The record of every pole, structure, substation item and vegetation span inspected, with findings, residual strength, defect classification, priority and treatment.

For trainers and assessors

Units of competency

Current on training.gov.au for the Transmission, Distribution and Rail Sector as at 10 September 2026.

UETDRDU017Locate faults in underground power cables
UETDRDU015Joint, terminate and maintain low voltage underground polymeric cable
UETDRDU002Inspect underground electrical apparatus
UETDRMP014Perform cable pit/trench/excavation rescue
UETDRMP001Apply access authority procedures to work on or near electrical apparatus

Qualifications

UET30821Certificate III in ESI - Distribution Underground
Assessor notes

What to look for

Evidence guide

The student must confirm the earths and spike the cable before cutting, treat the gas main and the excavation depth as controlled hazards with a rescue plan, and record test results as measured values. Restoration must follow the program sequence after cancellation of the authority with read backs recorded. Look for consistent records across the work order, the access register and the switching register.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.