Golf Simulator Room Electrical Plan: Where Every Outlet Goes Before the Frame Closes Up

A 120-volt, 20-amp circuit gives you 2,400 watts on paper. You only get to plan around 1,920 of them. The National Electrical Code derates continuous loads, meaning anything running three hours or more, to 80 percent, which puts the real ceiling at 16 amps (Source: NFPA/NEC continuous-load derating, as explained on Mike Holt's Forum). A sim session blows past three hours constantly, so that 1,920-watt number is the budget your projector, PC, lighting, and heat all have to share.

Most golf simulator room electrical plans get written after the drywall is up, which is the expensive order to do it in. Run the power during framing, while the stud bays are still open and before the enclosure is standing, and the whole thing costs a fraction of the retrofit. Here is the plan.

Start with the one circuit the code already requires

If your bay is going in a garage, you do not get to decide whether a dedicated circuit is involved. NEC 210.11(C)(4) requires at least one 120-volt, 20-amp branch circuit to serve garage receptacle outlets, and that circuit "shall have no other outlets" (Source: National Electrical Code 210.11(C)(4), as summarized by EC&M and the NC Office of State Fire Marshal).

Read that twice. The code already hands you a dedicated 20-amp circuit in a garage. That is the anchor of your plan, not an upgrade you talk yourself into.

The outlet requirement is thinner than you would hope. NEC 210.52(G) asks for one receptacle per vehicle bay, mounted no higher than five and a half feet off the floor (Source: National Electrical Code 210.52(G)(1), via Leviton Captain Code). One low outlet. That is the legal minimum for a space you are about to fill with a projector, a PC, a launch monitor, a tablet, bay lighting, and a heater.

What the data says about your actual load

Numbers beat guesswork here, because the components that look small are small and the ones that look big are enormous.

The Epson LS800 4K laser projector pulls 350 watts in normal mode, 217 in eco, and 2 in standby (Source: Epson published specifications, EH-LS800 spec sheet). That is roughly three amps. Your ceiling-mounted projector is not the problem.

The PC is a different story. Golf-sim gaming builds spanning an RTX 3060 for 1080p up to an RTX 4080 with an i7 for 4K get specified with 750 to 1,000-watt power supplies (Source: PlayBetter Gaming PC for Golf Simulator Buying Guide, with standard PSU sizing). Pair a 1,000-watt-capable PC with that 350-watt projector and you have eaten most of your 1,920-watt continuous budget before a single light bulb or heater joins in.

Then there is climate control, which is where the plan either holds or breaks. A portable 120-volt space heater draws 12 to 15 amps, so 1,440 to 1,800 watts, on a 15 or 20-amp branch. A hardwired 5,000-watt 240-volt garage heater pulls about 20.9 amps and needs a two-pole 30 to 40-amp breaker (Source: EasyBear Appliance Repair garage-heater power guide; Mike Holt Forum). A single plug-in heater can consume an entire 20-amp circuit by itself.

Where the outlets actually go

Ceiling, above and slightly behind the hitting zone

One ceiling outlet handles your projector and, if you run an overhead unit, your launch monitor. Put it where the projector mount lands, not where it is convenient to fish wire, because a two-foot miss turns into a visible extension cord across your ceiling forever.

Get the mount position from throw math before you cut the box in. Our projector distance calculator gives you the exact distance for your screen width and lens, and that distance is what the electrician needs.

Side wall, at PC shelf height

This is your dedicated 20-amp home: PC, monitors, AV receiver, surge protector. Keep it off the side where your trail foot and club path live, and put it on the wall rather than the floor so a mis-hit does not find it.

Lighting on its own switched leg

Keep bay lighting on a separate circuit from the projector. Shared legs mean a dimmer can inject noise into AV gear, and you want the option to kill lights without touching the sim. Fixture placement matters as much as the circuit, which we covered in the enclosure lighting plan.

Low wall outlets, per code, plus two more

The code minimum low receptacle is genuinely useful for a shop vac, a tablet charger, and mat sensors. Add a second one on the opposite wall while the bay is open. The marginal cost during framing is wire and a box.

Dedicated circuits or a subpanel?

The math is straightforward. A dedicated 20-amp circuit runs $250 to $600 installed, with $350 to $450 typical, broken into $120 to $260 labor, $90 to $180 materials, and $0 to $150 in permits. A 100-amp subpanel runs $800 to $4,000, with most homeowners landing between $1,900 and $3,200 (Source: HomeAdvisor dedicated-circuit cost data; aggregated 2026 subpanel cost guides).

Three dedicated circuits run during framing cost roughly $1,000 to $1,800. That is cheaper than a subpanel, so run individual circuits if your main panel has the open slots and the service capacity. Once you need a fourth circuit, or your panel is full, or you are adding 240-volt heat, the subpanel becomes the cheaper and cleaner answer.

For broader context on where this sits in the build, mid-range garage wiring with six outlets plus a dedicated 20-amp circuit typically runs $3,000 to $5,000 total, including 16 to 20 hours of labor and about $1,200 in materials (Source: 2026 garage wiring cost guide). Budget that as a framing-phase line item alongside the numbers in our garage build cost breakdown.

Sequence it right: power before screen

Electrical rough-in belongs between framing and enclosure install, in that order, every time. Once the frame is standing and the screen is tensioned, every wall and ceiling box behind it becomes a demolition job.

So the order is: finalize screen size and projector throw distance, mark the ceiling mount point, run the circuits and set the boxes, inspect, close the walls, then build the enclosure. Lock the screen dimensions first because they determine where the projector goes, which determines where the ceiling outlet goes.

If you are working in a basement rather than a garage, the circuit logic is the same but egress, moisture, and joist routing change the install. Our basement conversion checklist sequences those steps.

Three rules that keep it safe

Do not run the sim off extension cords. A 1,000-watt PC and a 1,500-watt heater on daisy-chained cords is exactly the load profile that overheats a 16-gauge cord.

Do not put the heater on the AV circuit. A 12 to 15-amp heater plus a PC will trip a 20-amp breaker, usually in the middle of a round.

Do not skip the permit in a garage. The 20-amp dedicated receptacle circuit is a code requirement, and the permit fee is already inside that $250 to $600 per-circuit number.

Lock your screen size first, then call the electrician

Every outlet position in this plan traces back to one measurement: how wide your screen is and how far back the projector sits. Get that right and the electrical plan writes itself.

Browse the golf impact screen collection to settle on your size before the electrician shows up. The Carl's Place Standard screen starts at $179.95, the Preferred from $298.95, and the Premium from $439.95, all sized to the room you are about to wire. If you are planning the full bay, the Complete DIY Golf Bay Package runs from $3,252.70 and gives you the frame and screen dimensions you need on the electrical drawing.