TPM
On many projects, the low-voltage scope is split up: one company for data cabling, another for cameras and access control, a third for the phone system, and sometimes a separate designer. Each one is good at its part. The trouble is in the gaps between them.
Where split scopes go wrong
- Pathways nobody owns. The camera installer assumed the cabling company would leave a conduit; the cabling company didn’t know the camera was there.
- Rack space and power. Three companies, three sets of equipment, one rack sized for one of them.
- Network settings. Cameras, access control and phones all need the network configured correctly, and each contractor thinks someone else is doing it.
- Finger-pointing after handover. When something stops working, it’s not always clear whose system caused it.
What EPC means here
EPC stands for engineering, procurement and construction. For low-voltage work, it means one contractor designs the systems, supplies the equipment, installs and programs it, and hands over one complete set of documents. The same team is responsible for how the systems work together.
For a general contractor or owner, the practical benefits are fewer coordination meetings, one schedule for every low-voltage system, and one company to call when something needs attention.
When splitting can still make sense
If an owner has a long relationship with a particular security provider, or a national account requires a specific vendor, splitting part of the scope is reasonable. In that case, give one contractor clear responsibility for the shared parts: pathways, racks, power and network.
Questions to ask any low-voltage contractor
- Who produces the drawings, and will we receive as-builts at the end?
- Will every cable be tested and certified, and do we get the reports?
- How are cables and devices labelled?
- Who configures the network for cameras, access control and phones?
- What does the warranty cover, for how long, and who do we call?
- Can we see a reference project of similar size?
Good answers to these six questions say more about a contractor than the price on the first page of a quote.