Subpanels and added distribution
A subpanel in the shop, the mezzanine or the back of the building so new circuits are not run the length of the property from a full main panel. Feeder sized for the load, with a disconnect where one is required.
Panels, subpanels, breakers, disconnects, transformers, feeders and three-phase distribution for shops, commercial buildings and farms across Red Deer and Central Alberta. Getting power to the machine safely, sized correctly, bonded properly and labelled so the next person can follow it.
From one added circuit to a full distribution arrangement for new equipment.
A subpanel in the shop, the mezzanine or the back of the building so new circuits are not run the length of the property from a full main panel. Feeder sized for the load, with a disconnect where one is required.
Feeder, overcurrent protection and a local disconnect for a machine, compressor, welder or dust collector. Rotation confirmed before the machine is handed back. See equipment and machine wiring.
Replacing failed, mismatched or obsolete breakers, fuse holders that overheat, and disconnects with burnt blades or a mechanism that no longer opens all poles. Nuisance tripping investigated rather than upsized.
600 V and 120/208 distribution for shops and light-industrial buildings, including panels, feeders and the arrangement that lets single-phase loads live off a three-phase service. Covered further under industrial electrical.
Dry-type transformers for 120/208 lighting and receptacle loads off a 600 V service, plus control transformers, secondary protection, bonding of the derived system and the grounding electrode connection.
Bonding conductors that were never landed, ground bars missing in subpanels, neutrals and grounds tied together downstream, and ground electrode connections that corroded off years ago. Tedious to correct, and the reason a lot of odd faults exist.
Tracing and labelling circuits, then leaving a schedule that matches the panel. During a breakdown, this is worth more than most people expect.
Upsizing a service or panel where the load genuinely calls for it — a shop adding a welder and compressor, or a building with no spare spaces left. Coordinated with the utility where a meter or service change is involved.
Burnt bus stabs, breakers that will not stay on, discoloured terminations, panels that hum or smell warm, and the aluminum feeder connections that were never torqued or re-torqued. See electrical troubleshooting.
“You need a new panel” gets said a lot, and it is not always true. A panel is a box, a bus and a set of breakers. If the bus is sound, the breakers are the right type and there is room for what you want to add, replacing it accomplishes very little. On the other hand there are panels that should have come out a decade ago. The difference is worth understanding before you spend money.
Cover off, look at the bus and terminations, check what is actually connected and what the loads draw, measure voltage under load, look at the bonding arrangement, and see what breakers are available for that panel. That is usually enough to tell you whether you are looking at a five-hundred-dollar correction or a real replacement. You get told which, with the reasoning, not just the number.
Tip: if you are planning to add equipment, get the load looked at before you buy the machine. Finding out afterward that the service will not carry a new welder and a hoist together is an expensive kind of surprise, and the answer is sometimes as simple as not running both at once.
Load check, then either a spare position, a subpanel or a dedicated feed with a fused disconnect at the machine. Rotation verified at the motor before handover.
Circuits traced and labelled, panel schedule written and left in the panel. Done properly once, it stops being a problem.
Thermal and visual check, terminations opened and inspected, damaged components replaced. This one gets prioritized, because it does not improve on its own.
It depends on what else you run and when. A welder’s nameplate rating is not what it draws all day, and duty cycle matters. Often the correct answer is a properly sized circuit off the existing service, sometimes with an agreement not to run it while the hoist and compressor are both going. Sometimes the service genuinely will not carry it. A load calculation and a look at the panel gives you a real answer instead of a guess.
No, and you would not want one. The breaker protects the wire, so upsizing it without changing the conductor leaves the wire unprotected. What we do instead is find out why it trips: how much the circuit draws, whether there is a ground fault, whether a motor is drawing high on one leg, or whether too much has been added to one circuit over the years. The fix follows from that.
Maybe, maybe not. What matters is the condition of the bus, whether proper breakers are still available for that panel, whether the bonding is correct and whether you have space for what you need. A sound old panel in a dry building is often fine. One with burnt stabs or no breakers available is not. It takes a look with the cover off to say.
A subpanel is a smaller panel fed from the main one, placed closer to where the circuits are needed. It makes sense when the main panel is far from the work, when you are adding several circuits in one area such as a detached shop, or when the main is out of space but the service itself is adequate. It is frequently cheaper than a service upgrade. See shop and garage electrical for the detached-building version.
Yes — three-phase distribution, feeders, disconnects, transformers and equipment power are a regular part of the work, along with motors, controls and VFDs that hang off them. What is not in scope is large new-construction electrical requiring a crew on site for months; this is an owner-operated business.
Yes. Panels in barns, shops and outbuildings see dust, moisture and ammonia, and they age differently from panels in a heated building. Corroded bus and terminations are common. That work is described on the agricultural electrical page, and covers Red Deer County and the surrounding areas.
Get it looked at before the machine arrives.