Custom Main Switchboards NZ Up to 8,000A

Clive Wilson Switchboards manufactures custom main switchboards (MSBs) for New Zealand’s industrial, infrastructure, and commercial projects. Engineered to AS/NZS 61439 in our ISO 9001-certified Invercargill workshop, every MSB is built for your specific fault level, environment, and expansion requirements.

Main Switchboard Capabilities

Up to 8,000A delivered: on Logstrup platform; higher rated assemblies on project-specific basis
AS/NZS 61439 compliant: Mandatory NZ standard
IP55 / IK10 rated: Harsh environments protected
ARC flash mitigation: Safety engineered in
ATS changeover: Auto/manual backup power
Simotrol platform: ISO 9001-certified

Need a quick prospective fault current calculation? Use our NZ Transformer Fault Current Calculator , estimate prospective short-circuit current from kVA, secondary voltage and impedance.

Decorative black dot grid pattern background for Clive Wilson Switchboards website

Completed industrial switchboard ready for dispatch, Clive Wilson NZ

Industrial and Commercial Switchboards

Fully Configurable

Fully Configurable Industrial & Commercial Main Switchboards

We manufacture fully configurable LV switchboards for industrial and commercial applications, using modular systems in wall-mounted or floor-standing enclosures optimised for your space and requirements.

IP20 to IP55: Ingress protection for any environment
Form 1 to Form 4A: Internal separation for fault containment
Generator changeover & bus coupling: Complete backup solutions
Hinging end panels: Easy busbar inspection access
Power quality metering: Check meters included
Energy meters + Modbus: SCADA/BMS communications ready

Fully compliant with AS/NZS 61439. Complete CAD drafting and engineering services provided. Every configuration is designed around your site layout, available space, and future expansion requirements.

+64 3 2144264

estimating@clivewilson.co.nz

Large multi-section motor control centre switchboard with rows of isolator switches and busbars built by Clive Wilson Switchboards Invercargill

Custom Engineered to Order

What Goes Into a Custom MSB

Every MSB Built From Your Specifications

Every MSB we build starts with your single-line diagram and site-specific requirements. Our in-house engineering team designs the board layout, busbar system, and protection coordination from scratch, not from a template.

Incoming ACBs 1200A to 8,000A: delivered; on Logstrup platform; higher rated assemblies on project-specific basis
Bus section & bus coupler: Flexible distribution arrangements
Generator changeover (ATS): Automatic transfer switching
Power factor correction: Integrated PFC systems
SCADA & BMS metering: Communications-ready metering
Arc fault detection: Where specified for safety

We build primarily on Simotrol platforms, with Schneider Prisma enclosures for smaller MSBs. We also work with Logstrup for higher-rated assemblies, and Rittal for PLC enclosures depending on project requirements.

Trusted Across New Zealand

Industries We Supply

Custom Main Switchboards for Every NZ Sector

Our main switchboards go into major industrial and commercial projects across New Zealand. We work directly with electrical contractors, consulting engineers, and end users.

Dairy processing plants: Fonterra and independent processors
Freezing works & cold storage: Alliance Group and others
Water treatment facilities: Municipal and industrial
Mining & smelting: NZAS and mining operations
Commercial buildings: Office, retail, and hospitality
Energy & infrastructure: Meridian Energy and grid projects

We have supplied MSBs to Fonterra, Meridian Energy, NZAS, Alliance Group, and Hastings District Council, along with hundreds of smaller industrial and commercial clients nationwide.

Do You Need Help
With Switchboards

Clive Wilson Switchboards Ltd manufactures industrial and commercial LV switchboards and Motor Control Centres (MCCs) in our ISO 9001-certified Invercargill workshop. We build on premium OEM platforms including Simotrol, Schneider Prisma, Quantum, and Logstrup: engineered for your specific application, fault level, and environmental requirements.

Give Us a Call Get in Touch

Custom main switchboard (MSB) built to AS/NZS 61439, Clive Wilson Switchboards NZ

Complete In-House Service

From Design to Delivery

Full MSB Manufacturing Process Under One Roof

We handle the full process in-house at our Invercargill workshop, no outsourcing, no delays, complete quality control from start to finish.

Electrical design & CAD drafting: Engineered to your specs
Enclosure modification & customisation: Built to your specifications
Powder coating: Durable finish in any colour
Assembly & wiring: Skilled in-house team
Full Factory Acceptance Testing: Every board FAT tested
AS/NZS 61439 certification: Complete test certificates

Every board ships with complete AS/NZS 61439 test certificates, wiring diagrams, and documentation. We deliver nationwide and coordinate with your electrical contractor for site commissioning support.

Built for Performance

Why Choose Clive Wilson Switchboards

Main Switchboard Specialists Since 1971

With over 50 years of switchboard manufacturing experience, Clive Wilson Switchboards delivers MSBs rated up to 8,000A for New Zealand's most demanding projects. Every board is custom-engineered in our Invercargill workshop, designed, fabricated, wired, tested, and delivered under one roof.

Simotrol & Schneider Prisma platforms: Premium OEM enclosure systems
Full in-house capability: Design, fabrication, powder coating, wiring & testing
AS/NZS 61439 compliant: Every board independently tested and certified
Manufactured under our ISO 9001-certified quality management system: Consistent manufacturing processes
Nationwide delivery: Site commissioning support available
EPLAN & CAD documentation: Complete drawings and test certificates included

From dairy plants and freezing works to commercial buildings, we manufacture main switchboards that perform reliably in the harshest New Zealand conditions. Contact our team for a competitive quote on your next MSB project.

+64 3 2144264

Monday to Friday 8:00 AM - 5:00 PM

Main Switchboard FAQs

Common questions specifiers and project engineers ask before placing an MSB order.

How long does it take to build a custom main switchboard?

Typical lead time is 8 to 14 weeks from engineering sign-off to factory acceptance test, depending on size and platform. Larger 4,000-8,000A assemblies on Logstrup can run 16 to 20 weeks. Long-lead components like ACBs and metering can drive the timeline. We order on engineering approval to keep things moving.

What fault level rating can you build to?

Up to 100kA/1s on our standard Simotrol platform and higher on Logstrup. Fault rating is verified by type test and short-circuit withstand calculations against your project requirements.

What forms of segregation do you offer?

Form 1 through Form 4a, including Form 3b for shipping infrastructure and Form 4a for mission-critical environments. We help specifiers choose the right form for the site.

Which OEM platforms do you build on?

Schneider Prisma Plus G as an accredited builder, Simotrol in-house, Quantum sheet metal for custom enclosures, and Logstrup for higher-rated assemblies. We select the platform that suits your application, environment, and budget.

Do you supply generator changeover and ATS arrangements?

Yes. Automatic and manual transfer schemes, bus coupling, and parallel operation with grid-tie. We handle full design from MSB through to genset interface.

Do you install the switchboard on site, or is delivery only?

Delivery nationwide is standard. Commissioning support and on-site installation are available with our maintenance arm. We coordinate with your electrician for connection and energisation.