Enter the horsepower and voltage, the breaker or fuse type and the raceway. The app gives the full-load current, breaker, fuse, conductor, ground, conduit, disconnect, starter and overloads on a numbered one-line, and writes it as a PDF.
The app’s own example, every screen in order, 18 steps.
STEP 1 OF 18The example opens filled in: 50 HP at 460 V, with the answer pinned at the foot of the screen.
STEP 2 OF 18The motor: nameplate FLA left blank, the service factor and temperature rise choices, then an inverse-time breaker and time-delay fuse.
STEP 3 OF 18Protected by the breaker. The raceway: EMT, THHN/THWN-2, and 500 kcmil as the largest conductor per set.
STEP 4 OF 18The raceway: EMT, THHN / THWN-2, 500 kcmil the largest per set. The one-line starts with a 175 A inverse-time breaker.
STEP 5 OF 18The one-line, numbered 1 to 8: 175 A breaker, 3 x 4 AWG Cu, 1 in EMT, 6 AWG EGC, 100 A disconnect, Size 3 starter, motor.
STEP 6 OF 18The figures: 175 A breaker, 3 x 4 AWG Cu, 1 in EMT, 6 AWG EGC, 100 A disconnect, NEMA Size 3. Overloads need the nameplate FLA.
STEP 7 OF 18How it was worked out: FLC 65 A from Table 430.250, then the breaker, fuse, conductor, ground, conduit, starter and overload.
STEP 8 OF 18The working, then the report, named Example - 50 HP pump: save or share the PDF, or save the job.
STEP 9 OF 18The report card, and below it the full-load current table, NEC Table 430.250, begins.
STEP 10 OF 18Full-load current, NEC Table 430.250: 1/2 to 125 HP at 208, 230, 460 and 575 V. 50 HP at 460 V is 65 A.
STEP 11 OF 18The table runs to 500 HP. Then breaker, fuse, starter and heater sizes by HP and voltage (430.52, 430.32).
STEP 12 OF 18Breaker, fuse, starter and heater, 1/2 to 15 HP at 230 V and 460 V.
STEP 13 OF 1815 to 150 HP. 50 HP at 460 V: 175 A breaker, 125 A fuse, Size 3 starter, 74.8 A heater.
STEP 14 OF 18Up to 500 HP, a note that these are the 430.52 maximums, then the conductor, ground and EMT table begins.
STEP 15 OF 18Conductor, ground and EMT by HP and voltage (430.22, 310.16, 250.122, Ch. 9): 1/2 to 10 HP.
STEP 16 OF 1810 to 150 HP. 50 HP at 460 V: 4 AWG, 6 AWG ground, 1 inch EMT. Parallel sets start at 125 HP, 230 V.
STEP 17 OF 18Up to 500 HP at 460 V: 2 x 500 kcmil, 2 x 4/0 ground, 2 x 3 inch EMT.
STEP 18 OF 18The PDF, page 1: the inputs and the answer, 4 AWG Cu with a 6 AWG ground in 1 inch EMT, breaker up to 175 A.
The same 18 screens with the captions burned in. No sound.
MP4, 1.9 MB, 19 seconds.
The PDF report for the same job, all 3 pages as the app writes it.
On Android, $49.99 once. Everything on this page.
The Suite has the Motors tool. The numbered one-line with the HP-rated disconnect, breaker or fuse protection, the nameplate FLA and service factor for the overloads, the insulation choice and parallel sets past 1000 kcmil came out of the app and are being brought back across.
