What rooftop unit wiring involves

A building owner wants the same answer every time. Is it safe, and when is it done. The work starts with finding out what is actually there. With rooftop unit wiring, that means looking at the existing wiring, the panel capacity and whatever the last person left behind.

Where repair makes more sense than replacement, we repair. Swapping out equipment that still has years left in it is good business for a contractor and a bad deal for you.

Where this comes up

Build-outs, tenant work, lighting and three-phase power for buildings that cannot go dark. Most of these calls come from Des Plaines and the surrounding suburbs, but we take them anywhere in our service area.

Older buildings in this part of Illinois were wired to a different standard. Aluminum branch circuits, knob-and-tube in the walls, panels that were full the day they were installed. Those turn up constantly and they change the job.

How we do it

Straight to the point: we find the problem, fix it to code and leave the space as clean as we found it. Anything that needs a permit gets one, and gets inspected.

Why this is worth doing properly

Electrical work is the kind you only see when it goes wrong. A connection that was never tightened properly, a splice with no box around it, a breaker larger than the wire behind it: all of it looks fine for years. Doing it properly means it stays fine, and the inspection is the independent check that the work was done the way it should be.

The cost of doing it right the first time is almost always lower than the cost of doing it twice. We would rather tell you the job is bigger than you hoped than come back in two years.

Scheduling and how long it takes

Once a job is booked, the work itself usually goes quickly. The waiting, when there is any, comes from permit offices and ComEd scheduling, which is why a service change takes longer to start than a repair does.

What we promise on timing is what we can actually deliver. If a date depends on somebody else, we say so at the quote and give you a range instead of a day we cannot guarantee.

What the permit actually buys you

A permit puts the work on the public record for the address. When the building changes hands, that record is evidence the electrical was done and checked. Without it, a buyer's inspector treats everything they find as suspect.

It also means the work was sized and installed to the code edition in force, not to whatever was normal when the building went up.

Grounding and bonding

Grounding is the part nobody sees and the part that decides whether a fault clears safely. The ground path has to be continuous and low-impedance from every device back to the service, and the neutral and ground can only be bonded together in one place.

A neutral bonded to ground in a subpanel is one of the most common defects we find. It works right up until it does not, and then it puts current on metal that people touch.

When to stop and call

Any time a device or the panel runs warm, buzzes or leaves a scorch mark, stop using that circuit. Leave it off and call us. We answer 24/7 for exactly this.

Smoke from an outlet, a fixture or the panel is not a wait-and-see problem. Kill power at the main if you can reach it safely, get out, and call the fire department first. Call us after, so the cause gets found and fixed.