Overhead line insulator washing

Skills and knowledge to carry out overhead line insulator washing principles and procedures, plus the skills to wash insulators supporting energised high voltage conductors.

Suitable for


Course duration

1 ½ days

Course includes

  • identify and apply worksite safety requirements
  • identify and prepare equipment for insulator washing
  • inspect and maintain tools and equipment used for insulator washing
  • test the quality of water used for insulator washing
  • test insulators for defects
  • wash insulators supporting high voltage apparatus


  • Network Authority Card (NAC)
  • Certificate III in ESI – Distribution overhead qualification
  • TLILIC2005 Licence to operate a boom-type elevating work platform (boom length 11 metres or more)
  • Licence to perform high risk work – WP (elevating work platform)

What to wear

PPE Level 1
See the Western Power PPE Procedure for more information about the requirements

What to bring

Fall arrest harness

Additional information

To undertake this course, you may be required to provide the following plant and equipment:

  • high voltage insulated EWP fitted with high voltage earth lead and spike
  • minimum of 450 litre water tank filled with de-mineralised water
  • high pressure washing unit
  • insulated high pressure hose
  • insulated washing wand
  • silicone wipes
  • a water meter
  • a wind meter

Note: All equipment must be in-test.


Written and practical assessment


A Certificate of Attendance at the end of this course

Associated Authorisations

XOHLW Overhead Line Washing
For information on how to apply for an Authorisation, contact the Authorisations Team

This course has no current classes. Please the waiting list.