Industrial Service
Three-Phase Power
Three-phase power installation and distribution for industrial premises — motor control centres, distribution board upgrades, sub-mains, cable management and full BS 7671 certification for manufacturing, production and plant environments.
What industrial three-phase power work actually has to deliver
01
Existing distribution that can't carry the new load
Adding machinery, a new production line or a process upgrade without assessing the existing distribution is a programme risk. We carry out a load flow assessment and confirm supply capacity before any design work begins — so the budget accounts for the full electrical scope.
02
Motor starting that causes voltage drops across other circuits
Direct-on-line motor starting draws significant inrush current and can cause voltage depression affecting other equipment on the same distribution. We design the motor circuit protection and, where required, specify soft-start or variable speed drive (VSD) solutions to manage this.
03
An MCC that can't be serviced without a full shutdown
Older motor control centres are often configured so individual drive or starter maintenance requires isolating the whole panel. New MCCs are designed with withdrawable or individually-isolatable sections so maintenance windows can be minimised.
04
No documented circuit history for the maintenance team
Industrial electrical installations are often modified over decades without updated documentation. We produce as-installed single-line diagrams, circuit schedules and EICR documentation at the close of every project — giving your maintenance team a reliable starting point.
Technical detail
Standards & compliance
- BS 7671 18th Edition — industrial wiring
- IEC 60947 — low-voltage switchgear and controlgear
- IP and IK ratings for industrial environments
- ATEX zone coordination for hazardous areas
- BS EN 60529 enclosure protection specification
Distribution & switchgear
- Main LV distribution board replacement and upgrades
- Sub-distribution boards for production zones
- MCCB and ACB specification and installation
- Power factor correction equipment
- Metering and sub-metering to ESOS requirements
Motor circuits & control
- Motor control centre (MCC) design and installation
- DOL, star-delta and soft-starter motor circuits
- Variable speed drive (VSD) installation and commissioning
- Motor protection relay specification
- SCADA and BMS integration wiring
Cable & containment
- SWA cable installation in industrial environments
- Cable tray, basket and conduit systems
- Pit and trench installations for production floors
- Mineral insulated cable for high-temperature zones
- Cable schedule production and labelling
The Numbers
0
On our manufacturing plant refurbishment — zero unplanned production stoppages across an 8-month programme. Every maintenance window returned on time.
8mo
Out-of-hours and weekend working across 8 months, integrated into the client's production schedule without disruption to any shift.
4
Four independent zones refurbished sequentially, each with its own commissioning and handover process.
Why specify Con-Tec
Heavy-Current Works, Zero-Tolerance Delivery
Our Three-Phase Power Approach
01
Load Assessment
Load flow analysis, supply capacity review and existing circuit condition assessment before any design work begins.
02
Design & Specification
Distribution design, MCC specification and cable schedules produced to BS 7671 and IEC 60947, with a phased delivery plan aligned to your production schedule.
03
Phased Installation
Works delivered zone-by-zone in agreed maintenance windows — out of hours where required — with zero unplanned downtime as the standard.
04
Commission & Certificate
Full load testing, protection relay commissioning, EICR and as-installed documentation at handover.
Related Case Studies
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What our clients say
“Con-Tec consistently meets the rigour our estates teams expect. Their compliance documentation, site discipline and turnaround on remedial works are exactly what large-scale healthcare contracts require.”
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Ready to Start a Project?
We respond to every commercial and industrial enquiry within one working day. Share your scope and programme and we'll come back with lead engineers, approach and a clear cost envelope.