You might be wise to first check with your property manager/board of directors and determine who is responsible for looking after the electrical system maintenance in your unit. Condos often like to keep their utilities systems work restricted to a few tradesmen so they can keep on top of failure trends and future requirements.

Further, in most places it's illegal to so your own electrical work in multiunit buildings.

The board has advised me that the wiring system in our building is a limited common element and is exclusively the individual unit owners responsibility. All the wiring from our fusebox into our unit is specific to our unit and would likely not impact anyone else.

Any advice on the issue would be appreciated.

Being responsible for having it maintained is NOT the same as it being legal for you to do the work. It impacts the other units because if your electrical hacking sets your unit on fire, you endanger your neighboring units. The allowance for single-family home owners poking at their own wiring DOES NOT generally applied to multi-unit buildings.