This is a question we get asked often.
The question arises when new loads are being added to an existing electrical system. Often we can replace existing circuit breakers or reconfigure existing wiring so that a sub-panel is not required. This always the first option prior to installing a sub-panel.
Top Reasons for Installing a Sub-Panel
- If you are adding a suite, outbuilding or an addition we will usually recommend a sub-panel to serve the new location. This way the new electrical system can be kept separate. By code, any circuit breakers for power in a suite must be accessible from within the suite or in a common area. Basically, you don’t want your tenant, or yourself, to have to go into someone elses area to reset a circuit breaker.
- Additional electrical circuits. Panels in older houses sometimes only have space for 12-16 circuits. If a new kitchen, bathroom or heating system is being installed and the original panel is full a sub-panel is needed. Sometimes, instead of installing a sub-panel, it makes more sense to replace the main panel with a larger one. For example, replace an original 12circuit panel with a 24 or 32 circuit panel.
- Illegal/unsafe wiring. Sometimes additional wires will be installed back to the electrical panel by a homeowner or handyman and they do not know what to do when there are no circuit spaces left. To replace the panel or install a sub-panel is too daunting of a task. Hey!...I can fit two wires on this circuit breaker! The installed electrical functions and thehome handyman feels proud of his accomplishment. This is where we see many problems; electrical fires, burnt insulation, carbon damage from arcing, damaged circuit breakers etc. It is also a good idea to check the entire circuit that was installed as there is a high likelihood of other problems. A sub-panel can be installed to properly connect the new circuits.
