Panel Schedule Generator

How to use it. Set the panel voltage, main type (main breaker or main lug only), rating, and the number of spaces and circuits — a 40-space load center holds up to 80 circuits with tandem (half-size) breakers, so set circuits accordingly. Then fill in each circuit’s breaker size, poles, optional VA, and description. The phase column (A/B for single-phase, A/B/C for three-phase) fills in automatically by slot. The breaker list includes tandem (two 1-pole in one space) and quad / triplex “space-saver” breakers (two 2-pole, or a 2-pole plus two 1-pole, in two spaces) — a quad or triplex shows a small VA and description box for each sub-breaker, and the load is placed on the correct phase per circuit (a triplex’s two 1-poles land on opposite phases).

Auto VA. When you pick a breaker, the VA field auto-fills with a real-world demand estimate — about 35% of the circuit’s capacity on single-phase services and 45% on three-phase, reflecting typical utilization rather than the breaker’s theoretical maximum (most panels average roughly 30–60% of full capacity in practice). It’s only a starting point — edit each VA to your actual connected load for an accurate schedule. Any value you type is kept and won’t be overwritten when you change the breaker; clearing a field re-enables the default.

Load balancing. Enter a VA per circuit and the summary computes the connected load on each phase — a 1-pole load lands on its phase, a 2-pole splits across two phases, a 3-pole across three — with a phase-imbalance percentage so you can rebalance before you wire it. On 120/240 V 3Ø (high-leg), remember phase B is the high leg (~208 V to neutral) — no 120 V loads on B.

Main capacity. The summary also compares your total connected VA to what the main / service can carry (main amps × system voltage). It warns once you reach 80% of the main (the NEC continuous-load limit, where you should increase the service size) and flags an over-capacity condition when total VA exceeds the main — at which point you need to reduce circuit loads or increase the service / main size.

Your work is saved automatically in this browser — refresh the page or come back later and the schedule is still here. Clear wipes the circuits to start a new panel (the panel info fields are kept). The summary also flags a high-leg violation if a 1-pole breaker lands on phase B of a 120/240 V 3Ø system.

Print / Save PDF produces a clean schedule for the panel door or your electrical plans; Download CSV opens in Excel for plan sets and submittals; Copy as text gives a plain-text version. This is a directory and balance aid, not a service load calculation — for commercial service and feeder sizing, our engineering team does that as part of design-build (the free load calculator is available as an educational NEC 220.82 tool). Verify against the current NEC and your local amendments.