33 Clyde Street, Invercargill 9810, NZ
admin@clivewilson.co.nz
+64 3 2144264
Mon-Fri 08:00 AM - 05:00 PM
+64 3 2144264 admin@clivewilson.co.nz
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Electrical Switchboard Design & Drafting Services NZ

Electrical switchboard design, GA drafting, AS/NZS 61439 compliance review, and factory acceptance test (FAT) services for industrial, infrastructure, and commercial projects across New Zealand. Backed by 55 years of NZ switchboard manufacturing experience and ISO 9001-certified quality management.

Consulting & Design Capabilities

Switchboard GA design: General Arrangement drawings, busbar layouts, equipment schedules
Protection coordination: discrimination studies, fault current calculations, ARC flash assessment
AS/NZS 61439 compliance review: design verification, type-test documentation auditing, gap analysis
PowerCAD modelling: full network analysis, load flow, voltage drop, short-circuit studies
EPLAN Pro Panel 3D design: 3D modelling of switchboard platforms with heat dissipation and airflow analysis
FAT specification & witness: FAT plan drafting, on-site witness programme, documented sign-off
NZ-wide commissioning: post-delivery commissioning, energisation, functional verification

Allen-Bradley ControlLogix PLC, automation and control systems by Clive Wilson Switchboards
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Lighting and power distribution switchboard, custom built by Clive Wilson Switchboards
Design & Drafting
Switchboard GA Design & Drafting

Engineered from First Principles, Drawn to Fabrication Standard

End-to-end switchboard design from your single-line diagram and load schedule through to fabrication-ready GA drawings. Built around your specific fault level, environment, and operations.


  • General Arrangement (GA) drawings: front, side, and plan elevations to fabrication standard
  • Busbar layout & ratings: horizontal and vertical busbar selection, support spacing, fault withstand
  • Schematic drawings: power, control, and protection schematics for every functional unit
  • Equipment schedules: BOM, MCB/MCCB/ACB selection, VSD and starter sizing
  • EPLAN Pro Panel 3D modelling: 3D models of our standard platforms (Schneider Prisma Plus G and Simotrol) for spatial planning and clash detection
  • Heat dissipation calculation: thermal load analysis on enclosed switchgear, ambient temperature de-rating, ventilation sizing
  • Airflow analysis: forced and natural convection modelling, fan sizing, filter selection for IP-rated enclosures
  • Cable schedule & conductor sizing: incoming and outgoing feeders, sized to AS/NZS 3008
  • Termination details: gland plate layout, cable cleat positioning, segregation per Form spec

Drawings issued in PDF and DWG/DXF for project record. Revision history maintained throughout the design phase. View MSB capability →

+64 3 2144264
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Switchboard design and electrical consulting services, contact Clive Wilson Switchboards NZ
Network Analysis
PowerCAD Modelling & AS/NZS 61439 Compliance

Power Network Analysis, Discrimination, and Compliance Review

Comprehensive electrical network modelling using PowerCAD, with AS/NZS 61439 compliance review on existing or proposed switchboards. Useful before specifying upgrades or for tender compliance audits.


  • Load flow analysis: real and reactive power, voltage drop, network losses
  • Short-circuit calculations: 3-phase, line-to-line, line-to-earth fault levels at each bus
  • Protection discrimination: time-current curves, selectivity verification, settings recommendation
  • ARC flash assessment: incident energy calculation, PPE category mapping, label generation
  • AS/NZS 61439 compliance audit: existing switchboard verification against current standards
  • Type-test documentation review: confirms manufacturer documentation matches the as-built assembly

Findings issued as a written report with recommended remedial actions and indicative pricing.

Talk to us about your project
+64 3 2144264
admin@clivewilson.co.nz

Need Switchboard Design or Compliance
Help?

Specifying a switchboard upgrade, retrofit, or new build? Our consulting team scopes the design, runs the network analysis, and delivers fabrication-ready drawings, backed by 55 years of NZ switchboard manufacturing experience.

Give Us a Call Get in Touch
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Motor control centre starter options, VSD and soft starter switchboard panels by Clive Wilson
Commissioning & Witness
FAT Witness & On-Site Commissioning

Factory Acceptance Test Programme + Nationwide Commissioning

Witness programme at our Invercargill workshop before delivery, plus on-site commissioning support nationwide. Reduces site commissioning risk by catching integration issues at FAT, not on site.


  • FAT specification drafting: documented test plan covering visual, mechanical, and functional checks
  • Witnessed FAT: 1- or 2-day programme with operator and consulting engineer attendance
  • Routine verification: per AS/NZS 61439.1 clause 11, signed off by registered electricians
  • On-site energisation support: coordination with the lines company and installing electrician
  • Functional verification: PLC tests, motor sequence runs, alarm verification
  • As-built documentation: drawings updated post-commissioning, software backups archived

Send us your design brief, P&ID, single-line diagram, and equipment list. We will scope the design and FAT support together.

+64 3 2144264
Mon-Fri 8:00 AM - 5:00 PM | After-hours support by arrangement
Common Questions

Consulting & Design FAQ

Common questions specifiers ask about switchboard design, compliance review, and FAT support.

For a design quote we need: project description, target fault level (kA at incomer), schedule of loads with motor sizes, form of segregation requirement, IP/IK rating, and platform preference if any. If you do not have all of those yet, send what you have and we will tell you what is missing.

Yes. We model load flow, short-circuit, voltage drop, and protection discrimination using PowerCAD. Output includes a written report with recommended protection settings and ARC flash incident energy calculations where the project requires it.

Yes. We do compliance gap analysis on existing assemblies, including review of the manufacturer type-test documentation against the as-built configuration. Useful before specifying upgrades, retrofit ACBs, or for procurement audits. Findings issued as a written report.

Yes. Yes. We run a FAT witness programme for the switchboards we build. 1 or 2-day programme depending on scope, with operator and consulting engineer attendance and documented sign-off.