Title Page

  • Site

  • Document No.

  • Job Number

  • Client

  • Date

  • Audit conducted by

Switchboard Inspection

Visual Inspection. Please add photos to each question where practicable.

  • Inspect switchboard for damage. Is switchboard in good condition?

  • Please describe issue. Add photos

  • Is the switchboard clearly and permanently labelled identifying the switchboard

  • Please describe issue. Add photos.

  • Are locks, hinges, hasps, door stays, etc. in good condition and fit for service?

  • Please describe issue. Add photos.

  • Are all escutcheons/covers present and in good condition?

  • Please describe issue. Add photos.

  • Is there adequete protection to ensure live parts cannot be accessed through covers/escutcheons

  • Please describe issue. Add photos.

  • Are all metallic parts earthed? (doors, metal escutcheons, etc.)

  • Please describe issue. Add photos.

  • Is the enclosure sealed to prevent the ingress of moisture or vermin?

  • Please describe issue. Add photos.

  • Is the consumer main neutral directly connected to the main neutral bar

  • Please describe issue. Add photos.

  • Is the main incoming neutral labelled as "MAIN INCOMING NEUTRAL - DO NOT DISCONNECT"

  • Is the main earthing conductor directly connected to the main earth bar?

  • Please describe issue. Add photos.

  • Is the main earthing conductor labelled as "MAIN EARTH - DO NOT DISCONNECT"

  • Are all neutral bars directly connected back to the main neutral bar? Must be unswitched

  • Please describe issue. Add photos.

  • Are all earth bars directly connected to the main earth bar?

  • Please describe issue. Add photos.

  • Are neutral and earth bars adequately sized in relation to the largest conductor?

  • Please describe issue. Add photos.

  • Is earth stake/grid connected to main earth, mechanically protected and coated in anti corrosive material (paint or denso)

  • Please describe issue. Add photos.

  • Is MEN link present and appropriately sized?

  • Please describe issue. Add photos.

  • Are all phase colour markings/heat shrink correct?

  • Please describe issue. Add photos.

  • Check all connections for tightness, including control wiring. All tight?

  • Are switchboard single line drawings present?

  • Is there a mud map indicating underground cable routes present?

  • Is the MPOS zone diagram present at this switch board and also at related switch boards? (If applicable at this site)

Testing

Neutral & Earth Continuity/Resistance Tests. Where multiple paths exist, record worst reading. Ensure CBs and switches are in the Off position before testing. Please specify if results are expressed in ohms or micro ohms. Any reading greater than 0.5 ohm is considered a failure. Please investigate any abnormal readings.

  • Meter used in continuity tests

  • Main earth cable resistance (SMSB to stake)

  • Neutral bar to earth bar resistance via MEN

  • Main earth bar to all other earth bars (if applicable)

  • Main earth bar to all other earth terminals

  • Main earth bar to all metallic parts

  • Main neutral bar to all other neutral bars

  • Main neutral bar to line terminal of all RCDs

  • Main neutral bar to neutral terminals of control equipment

Insulation Resistance Tests. All final tests at 500V minimum, 1000v preferred. Ensure all switches and CBs are in the On position. Remove surge arrestors and disconnect REM Live Indicator before tests. Unplug comms equipment if present. Ensure personnel are clear before testing. Conduct an introductory test at 250v in case of any sensitive electronic components. Conduct test at line side of incomer. Test results are expected to be over the maximum scale of the meter used and in any case should be a minimum of 1 Megohm. Please investigate any abnormal readings.

  • Meter used

  • R - W, B, N & E

  • W - R, B, N & E

  • B - R, W, N & E

  • N - R, W, B, & E

Phasing/Polarity/Continuity Tests. Ensure CBs and switches are in the On position before testing. Verify continuity from main incomer all the way through to load terminals of CB/RCDs and any control wiring in the switch board. Start with incoming Red to all Red terminations. Move onto White and Blue. Neutral and earth continuity have already been verified. Ohm values not required in this section, a verification of phasing/continuity will suffice. Please investigate any abnormal readings.

  • Red - Red

  • White - White

  • Blue - Blue

Correct Circuit Connections Tests. Ensure CBs and switches are in the On position before testing. Verify continuity from main incomer all the way through to load terminals of CB/RCDs and any control wiring in the switch board. Start with incoming Red to all Red terminations. Observe the single line drawing. Now, open/close each CB/switch in turn to verify loss of continuity as per the SLD. For example, you should lose continuity when either the SPD, Main Switch or local CB is opened and regain continuity as you close them again. These devices should be opened/closed individually in turn to verify that any one of these devices acting alone breaks the circuit. Move onto White and Blue.

  • Meter used

  • Red - Red

  • White - White

  • Blue - Blue

Circuit Breaker Settings. Verify settings with client engineer.

  • Q1 current setting

  • Q2 current setting

  • Q3 current setting

  • Q4 current setting (if applicable)

  • Does Customer SPD grade with Western Power's upstream protection as noted on Western Power's SLD?

Close out

  • Has MEN link been restored after testing, is it permanently marked and torqued (if applicable)?

  • Drawings marked up as constructed?

  • Green line drawings signed and dated?

  • Mark testing date using permanent marker inside the door of the switchboard. Has this been done?

  • Comments (tagged, locked out, etc). Please note any works that are incomplete out in the field and ensure relevant CBs are locked/tagged out.

  • Is the switch board finished and fit for service?

  • Please add photos of the switchboard. Photos should include views behind escutcheons of items such as CTs and terminations.

  • Electrical Licence Number

  • Sign off

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