Septic Pump and Control Panel Wiring on a New Build in Kalama, WA

Septic work is one of the few jobs where the electrician shows up in the middle of somebody else’s schedule and has to be gone before the hole closes. On this new build in Kalama, WA, Newman Electric ran the underground feeds to the tank risers, wired the pump and floats inside them, and mounted and commissioned the treatment control panel on the house.

What the electrician actually owns on a septic system

The septic contractor sets the tanks and the pump. The electrician owns everything that makes it run, and on a treatment system that is more than a single circuit:

• The underground run from the house out to the risers, in conduit, coordinated so it goes in while the trench is already open
• The pump wiring landed inside the riser, in an enclosure that will spend its life in a wet, buried box
• The float wiring, which is what tells the panel when to call for the pump
• The control panel on the house, mounted, fed, wired and tested

Get the sequence wrong and somebody is digging a finished yard back up. This is the part of new construction where being on the general contractor’s schedule rather than your own is the whole skill.

The control panel is most of the job

From the outside it is a grey box on the siding. Inside it is a small industrial control system: a Siemens LOGO! controller, a contactor, terminal blocks, an AUTO / OFF / HAND selector, an alarm test, and separate breakers for the control side and the pump.

Two details matter more than they look:

1. The pump and the controls are on their own breakers. If the pump trips, the controller and the alarm stay alive to tell somebody about it. Sharing one breaker means a failed pump also kills the thing that was supposed to warn you.
2. The terminals are labeled. Ground, pump neutral, pump L1, control L1, controls neutral. Whoever services this in eight years is not going to be the person who wired it.

Wet locations decide the details

Everything at the riser end lives underground in a box that fills with humidity, so the choices there are about longevity rather than code minimums: enclosures and fittings rated for the location, connections made to be serviceable from the top of the riser, and enough conductor left in the box that the next person can pull the pump without cutting anything.

The same thinking applies to any dedicated pump circuit, whether it is septic, a well, or a sump. The load itself is simple. The environment is what kills the install.

Building in Kalama, Woodland or anywhere in Cowlitz County and need the septic side wired on schedule? Call 360-828-7143 or get the pump wiring scheduled and we will work to your trench date.