Installing an Electrical System in a Monolithic Dome

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The main electrical conduits are installed prior to placement of shotcrete.

Here electricity is run across a bay of windows conventionally constructed inside a dome augment. Click here to see the finished product.

July 25, 2005

by David B. South

The electrical system for a Monolithic Dome is very similar to a conventional house. Most domes don't have vertical exterior walls so the meter base will need to be pedestal mounted. This should not pose any problem to any competent electrician. The total load on the building will be primarily from the uses within the building. If electric heat is used we generally recommend two watts per square foot. This means very small amounts of electrical power is needed. Air conditioning, water heating, and cooking are the main loads.

Electrical outlets and wiring require a little more planning and preparation before constructing your dome. Plan where you want electrical outlets and lights in the dome wall. After rebar is in place, attach plastic or steel conduit to the rebar. Also fasten the electrical boxes in the appropriate places. After the concrete is sprayed, wires may be pulled through the embedded conduits to their appropriate boxes. The remaining electrical is run as in any conventional house.

Normally, a second system of conduits is installed to allow for sound systems, computers, and telephones to be hard wired. Pay attention to electronic gadgets and their plug-in requirements when planning your Monolithic Dome.

Gas vs. Electric

Here again, because Monolithic Domes are so airtight, we strongly suggest that Monolithic Domes be kept totally electric. If gas is to be used, we suggest using a separate building outside the dome home for the water heater and main heat unit. Don't take the chance of poisoning family members with fumes from gas appliances.

On-Demand Water Heaters

Also, we suggest sizing the electrical system large enough to use on-demand water heaters. To use or not to use a tankless water heater needs to be decided before electrical is installed. Our experience with electric tankless water heaters has been positive and we highly recommend them. They are not only cost efficient, but space efficient too. When installed correctly, they provide all the hot water needed. They are simple, space efficient, and don't require drain piping. There are several brands to choose from. Although they use more power for the short amount of time they are on, they do not burn more electricity, they burn less over the course of a day.

Installing an Electrical System in a Monolithic Dome

Click Images to Enlarge

Gas vs. Electric

On-Demand Water Heaters

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