Tag Archives: electrical

Electrical Design, Rev. 0

Task one was figuring out how much power I have to play with. I lucked out and have easy access to the bathroom 20 amp circuit. I will splice a line from this circuit into an RV Disconnect Box. In the disconnect box I can swap in a 15 amp breaker on the pre-installed outlet. This will give me a safe way to shut off power to the system should I need to work on the electrical. Additionally my grow room will never overpower the bathroom circuit, and I can use 14 AWG wire which is much easier to work with. Power distribution will occur in 2 places. 6 relay switched outlets built into the controller housing and 6 always on outlets in their own enclosure. For now, I will use metal electrical enclosures attached to some plywood and wired with conduit. This plywood could be hung/mounted where ever is convenient once construction is complete.

The grow room will use 2 400 W grow lights with HPS and MH bulbs as needed for flowering and vegetative grow phases.

Cost Analysis

Sourced through Amazon for easy list making, could be found cheaper around the net and locally.

Lighting Shopping List

Total: $350

Happy Toking!
Indica Sloth

Grow Room Design, Rev. 2

Minor tweaks so that the Foylon goes on the inside, covering up the PVC and reducing degradation from UV light.

Enclosure will be built with 1″ PVC and Foylon walls. It will measure 5.3′ x 3.75′ x 6′. The enclosure will be anchored to pressure treated plywood at the base. If need be, it will also be anchored to the basement ceiling. Foylon will be attached with Wide and Tough Gorilla Tape. Weatherstripping will be placed along the edges.

Grow Containers will be 5 Gallon Food Grade Buckets sitting on milk crates with 6″ net pots in the lids. They will have either 2 or 4 mist nozzles depending on mist pattern. They will drain from the bottom, back into the reservoir.

Reservoir will be ~10 gallon in size, sourced locally, and depends on local pricing and availability.

Pump will be an Aquatec 8800 RO Booster pump with an 80/100 Pressure switch and Shurflo RV Accumulator.

Intake fan will be a 6″ inline 240CFM duct fan filtered with an automotive cabin air filter at the intake.

Exhaust fan will be a Ventech 6″ inline fan and carbon filter combo.

Power will be supplied by a 15 A Circuit spliced from the nearby 20 A Bathroom circuit, mounted in an RV electric hook-up.

Lighting will be two Apollo 400 Watt ballasts with wing hoods, swapped between HPS/MH as appropriate.

Controller will be a Raspberry Pi, with relay switched outlets and temp/hum inputs.

Grow Room Design, Rev. 1

I submitted Revision 0 plans to a number of forums and Reddit. The general feedback was more light and thicker PVC. I decided to add a hanging panel to the ceiling, to more evenly distribute the weight of the lights and allow for fine tuning their placement. I also remeasured the space and tried to leave room for a dry/cure cabinet to be installed in the space as well. I added in electrical, ventilation and plumbing.┬áMy plan for using Velcro along the edges was supported by community feedback. The lights will be 400W and ventilation is 6″ diameter.

Further Reading:

Checking out the house wiring.

In an ideal world I would run this system on a dedicated 20A circuit. But house wiring rarely makes it this easy. To start I went through my breaker box, turning off fuses with a nightlight plugged into my hopeful outlet. Once I isolated it, I left it off and went through my entire house so I would know what else was on the circuit.

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