Commercial & HOA
Load Planning for Commercial Displays in Summit County
September 25, 2026
The exterior receptacle by the front entrance of a Frisco storefront is almost never a spare circuit. It usually shares a breaker with the entry sconces, a bathroom exhaust fan, and whatever got added during the last remodel. In July that arrangement is invisible. In December, when a property manager plugs 600 feet of roofline into it alongside four wreaths and a pair of inflatable-free but still power-hungry lit trees, the breaker finds out first — normally around 4:45 p.m. on a Saturday when the lot is full.
Commercial holiday lighting fails on electrical planning more often than it fails on hardware. The clips hold. The strings hold. The circuit gives up. And in a county where the display runs from mid-November through early January under snow, that failure is a repeat event, not a one-time nuisance.
Do the amp math before anyone climbs a ladder
A 20-amp, 120-volt circuit gives you 2,400 watts on paper. Code practice says plan for continuous load at 80 percent, which puts the working ceiling at roughly 1,920 watts — call it 16 amps. Holiday lighting runs for 12 to 16 hours a day for six or seven weeks. That is continuous by any reasonable reading.
Commercial-grade LED C9 strings draw very little per bulb, which is why LED changed what is possible on a large building. But a lodge frontage adds up fast, and the draw is not only in the roofline:
- Roofline runs — the smallest share of the load on most LED installs, and the part people worry about most
- Wrapped columns and trunk wraps — mini-light density on a 20-foot lodgepole column is far higher per foot than a C9 roof run
- Lit wreaths with power-hungry bows or spotlights
- Anything incandescent still on the property — one legacy string can eat what thirty LED strings use
- Timers, transformers, and controllers — small, but they count
Write the wattage of every element on a sheet before the design is final. Then assign elements to circuits on paper. If a circuit lands above 70 percent of its ceiling, split it. The goal is not squeaking under the limit; it is leaving room so that cold weather, a slightly long extension run, or a future addition does not push the display over.
Cold and voltage drop make the paper numbers optimistic
Summit County properties sit between 8,700 feet in Silverthorne and 9,712 feet at Copper Mountain, and overnight lows in December regularly run below zero. Cold itself does not increase LED draw meaningfully, but everything around the circuit gets less forgiving.
Long cord runs are the usual culprit. A big lodge or a strip of retail bays often has one usable exterior receptacle and 150 feet of building to light, so somebody reaches for a 16-gauge cord from the hardware store. Voltage drop over that distance means the far end of the display runs dim and the connections work harder. Use 12-gauge outdoor-rated cord for anything long, keep runs as short as the layout allows, and feed from more than one point when the building gives you the option.
GFCI protection is the other cold-weather variable. Moisture in a connection, snowmelt running into an unsealed plug, or an ice-filled receptacle box will trip a GFCI, and it will do it at 2 a.m. when nobody is there to reset it. Elevated plugs, drip loops, sealed connections, and covers that actually close over a plugged-in cord are not fussy details on a commercial job — they are the difference between a display that runs all season and one that needs a service call every storm.
Metal roofs and snow load change where the power goes
Standing-seam metal is everywhere on Summit County lodging and newer commercial buildings, and it rules out adhesive and anything that penetrates the panel. Attachment happens with seam clamps, which means the roofline run follows the seams and the gutter line, not wherever a cord happens to reach. That constraint decides where your feed points need to be.
Snow load matters for the same reason. A display installed in November sits under accumulation for months, and on a metal roof that accumulation slides. Cords and connections routed across a slide path get torn out. Feed points belong under eaves, on protected walls, or in locations a roof avalanche will not reach. Plan the power path and the snow path together, or the electrical layout will be redone in January whether you wanted to or not.
Wind exposure is an electrical problem too
Lakeside Dillon and ridge properties in Silverthorne and Keystone take steady wind that works connections loose over weeks. A plug that is merely inserted will back out. On exposed elevations we tighten attachment intervals and secure every connection point — taped, tied, or locked — because a display that goes half-dark from a separated cord reads to guests exactly like a display that failed.
What a property manager should check right now
September and October are when this work is cheap and easy. Once snow is on the roof, an electrician's options narrow and so do ours.
- Find and label your exterior circuits. Which breaker feeds each outside receptacle, and what else is on it?
- Identify whether a dedicated circuit exists. On many older Breckenridge and Frisco buildings, it does not.
- Get an electrician's quote now if you need one added. Adding a dedicated 20-amp exterior circuit with a weatherproof in-use cover is a small job in September and a scheduling problem in December.
- Locate your timer or controller somewhere accessible without a ladder, so staff can reset it.
- Decide who resets a tripped GFCI at 6 a.m. and write it into the opening checklist.
Design around the power you have
Not every building can get a new circuit before the season. That is a design input, not a dead end. Lighting the entry and two gables well beats lighting the whole frontage badly on a circuit that cannot carry it. We walk the property, read the panel, count the receptacles, and build a display the building can actually run for seven weeks straight — then install it with commercial-grade materials, service it through the season, and take it down in January.
Frisco-based, backed by over 15 years of professional lighting installation experience. Tell us your address and roughly how much frontage you want lit, and we'll come look at your panel before we draw the design.