Commercial Service
Air Conditioning
Electrical supply, installation and commissioning for commercial air conditioning systems — dedicated circuit provision, circuit protection, isolator installation and full BS 7671 certification for VRF, split and multi-split configurations.
What the electrical side of an air conditioning project actually has to solve
01
Undersized electrical supply for the system specified
VRF and multi-split outdoor units carry significant electrical load. We assess the available supply, calculate the required circuit ratings and confirm whether the existing distribution can carry the additional demand before any equipment is ordered.
02
Circuit protection that doesn't meet manufacturer requirements
Equipment warranties and Building Regulations compliance both depend on correctly specified overcurrent protection and isolators. We design the electrical supply to the equipment manufacturer's technical requirements from the outset.
03
Coordinating electrical works with the refrigeration contractor
Air conditioning projects involve at least two specialist trades. We coordinate the electrical programme with the refrigeration engineer so containment routes, power points and commissioning sequences are aligned and neither trade is waiting on the other.
04
Lack of certification for Building Control and insurance
New air conditioning circuits must be notified under Part P and certified to BS 7671. We handle the notification, produce the test certificates and provide the completion certificate — ensuring your building records are complete at handover.
Technical detail
Standards & compliance
- BS 7671 18th Edition — circuit design and protection
- Part L compliance — energy metering and controls
- F-gas Regulation coordination with refrigeration contractor
- Equipment manufacturer wiring and protection requirements
- BS EN 60529 IP rating for outdoor unit isolation
Circuit provision
- Sub-main circuits from the main distribution board
- Dedicated final circuits per indoor and outdoor unit
- Correct cable sizing for inrush current and diversity
- RCBO protection to equipment specification
- Local lockable isolators and commissioning switches
System types supported
- VRF / VRV multi-zone systems
- Cassette and concealed duct indoor units
- Wall-mounted split and multi-split systems
- Computer room air conditioning (CRAC) units
- Fresh air ventilation unit power supplies
Commissioning & documentation
- Electrical commissioning to BS 7671
- Test certificates and circuit schedules
- As-installed distribution board schedules
- Building Regulations Part P notification
- Coordination with refrigeration commissioning engineer
The Numbers
18th
All circuit designs, protection devices and cable sizing comply with the current edition of the IET Wiring Regulations.
1pt
A single Con-Tec engineer coordinates the electrical works from design through to commissioning, liaising directly with your refrigeration contractor.
48hr
Test certificates and circuit schedules submitted within 48 hours of commissioning completion.
Why specify Con-Tec
The Electrical Half Done Properly
Our Air Conditioning Electrical Approach
01
Supply Assessment
We review the available supply capacity against the proposed system load and confirm circuit protection and cable sizing before any equipment is ordered.
02
Design & Coordination
Circuit layout, containment routes and isolator positions are designed and shared with the refrigeration contractor to align both programmes before first fix.
03
Installation
Sub-mains, final circuits, isolators and commissioning switches installed to BS 7671 by NICEIC-approved engineers — coordinated with the refrigeration programme.
04
Commission & Certificate
All circuits tested and commissioned with the refrigeration engineer present. Test certificates, Part P notification and circuit schedules provided at completion.
Related Case Studies
Eric Wright Group
Mixed-use commercial fit-out
NHS Foundation Trust
Critical care distribution upgrade
North West Local Authority
Multi-site EICR programme across 47 public buildings
1 / 4
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.”
Get a Quote
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.