Planning Cabling for a Tenant Improvement Without Blowing the Schedule

On most tenant improvements, low voltage is the last trade anyone thinks about and the first one asked to make up lost time. That is backwards, because the decisions that matter most for cabling have to happen before walls close.

Decide the closet location first

Everything else follows from where the equipment room lands. Put it in a corner of a long suite and half your runs get 30 meters longer for no reason. Put it next to a break room and you inherit a heat and moisture problem. The closet should be central, conditioned, and big enough that the door still opens after the racks go in.

Pin down drop locations early

Walk the furniture plan, not the architectural plan. Desks, conference tables, printer nooks, and reception all drive drop locations, and those move constantly during design. Locking them a week before drywall is normal. Locking them after is expensive.

The sequence that works

• Design phase: closet location, pathway, and sleeve locations coordinated with the GC
• After framing, before drywall: rough in, box mounting, and cable pull
• After ceiling grid, before tile: overhead runs, J hooks, and access point drops
• After drywall and paint: terminate, dress the rack, and label
• Before occupancy: test and verify every port and photograph the finished work

The two most common schedule killers

The first is discovering that nobody coordinated firestop and sleeve penetrations, which means core drilling after finishes are in. The second is furniture arriving before cabling, so cubicle feeds have to be pulled through installed panels instead of open ones. Both are avoidable with one coordination meeting during design.

If you are planning a build out anywhere in the Phoenix valley, the cheapest call you can make is the early one. A thirty minute conversation during design routinely saves more than the entire low voltage change order budget.