How A&T Designs IP-Rated MCC Enclosures To Prevent Overheating
Your enclosure is killing your MCC. Engineers specify IP-rated enclosures to shield MCCs from dust, water and harsh environments. Yet many watch those same enclosures trap heat inside. Components run hotter than planned, and it is followed by failures.
Standard suppliers deliver sealed boxes that, on paper, meet IP65 or IP66 ratings. They rarely address the thermal reality inside. At A&T Enclosures, we refuse to accept that compromise.
Standard Enclosures Ignore Thermal Dynamics
Most manufacturers focus on the outer shell. They punch holes for glands, weld seams tight and apply powder coat. Then they stop. Inside, high-current busbars at 4000A plus generate serious heat. Circuit breakers and contactors add their own load. Without deliberate layout planning, hot spots form fast. Airflow paths stay blocked. Heat builds because no one modelled the internal dynamics.
We changed that approach years ago. Our engineers treat every IP-rated enclosure as a complete thermal system. We start with the exact current ratings and load profile you supply. Then we design the interior layout to move heat away from sensitive parts.
The Risks Hit Hard And Fast
Downtime arrives without warning. A motor control centre that overheats trips unexpectedly. Production lines stop. Repair teams scramble. Component failure rates climb. In extreme cases, insulation degrades, and arcs develop. Insurance claims rise. Project timelines slip.
We hear the same frustration from specifiers. They ask how to manage heat inside IP65 or IP66 MCC enclosures. They wonder whether any enclosure manufacturer can actually support real thermal design. We do it every week.
At A&T Enclosures, we integrate thermal design from the first sketch. Our team works directly with your electrical layout. We position busbars to promote natural convection where possible. We calculate temperature rise limits in line with BS EN 61439-2. We select materials and finishes that conduct heat more efficiently. When natural cooling falls short, we introduce targeted solutions that preserve the IP rating.
We model the enclosure in 3D early. We simulate heat paths. We adjust compartment sizes, internal baffles and mounting heights until the design stays well within safe operating temperatures. Every decision protects the IP rating you need while keeping components cool.
A renewable energy developer needed floor-standing MCC enclosures for a 4000A distribution system in a coastal wind farm. Salt spray demanded IP66. High continuous loads demanded zero risk of overheating. Standard options would have forced derating or extra external cooling.
We redesigned the entire assembly. We optimised the busbar arrangement for even heat distribution. We incorporated internal heat sinks that stayed fully sealed. We verified the layout through our in-house design software. The final enclosures delivered full IP66 protection and kept internal temperatures 18 degrees lower than the original proposal. The site has run without thermal trips since commissioning.
We Deliver Measurable ROI
Reduced failures mean fewer emergency call-outs. Maintenance intervals stretch out. System lifespan extends. Project costs fall because you avoid oversizing or add-on cooling kits.
Clients return to A&T Enclosures because our enclosures simply work longer in demanding conditions. We remove the guesswork that forces engineers to choose between protection and performance.
We never treat it as an afterthought. If you manage high-current motor control centres, you already know the pressure. You need enclosures that protect against the environment without cooking the electronics inside.
Request A Thermal-Optimised Enclosure Design
Tell us your current ratings, environmental conditions and IP requirements. Our team will return a fully engineered proposal that balances protection and cooling. We turn the sealed enclosure challenge into a competitive advantage.
At A&T Enclosures, we design IP-rated enclosures that keep your MCC safe and efficient. We handle the thermal details so you can focus on the wider system. The result is reliable power distribution that stays online exactly when you need it.