Feeder Tap takes the feeder device, the tap length, where it runs and what it ends in, and gives back the 240.21(B) rule that applies, the smallest tap conductor and a check of every condition.
The drawing the Suite wrote for a 25 ft tap from a 400 A feeder: the tap point, the tap conductors and the breaker they end in, with every condition of the rule checked below.
The report the Suite wrote for this example: the inputs and results on page 1, the drawing on page 2.
Page 1 lists the inputs and the worked-out result, ending in 3/0 AWG Cu (200 A at 75 °C), every condition met; page 2 is the drawing with its checks.
The phone app's example job, Example - 25 ft tap, opened with Open phone job… and worked out by the Suite.
STEP 1 OF 5The example in, before it is worked out: 400 A feeder, 25 ft tap inside a building in raceway, ending in a 200 A breaker, 160 A load.
STEP 2 OF 5Worked out: 25 ft tap rule 240.21(B)(2), 3/0 AWG Cu (200 A at 75 °C), every condition met, each one shown OK.
STEP 3 OF 5The same tap under the 10 ft and outside rules, the rules for every tap, then the drawing begins: 400 A feeder device and the tap point.
STEP 4 OF 5The drawing: 25 ft of 3/0 AWG Cu in raceway from the tap point to a 200 A breaker, and the five conditions checked.
STEP 5 OF 5Under the drawing: the rules for every tap, what people get wrong, and the same tap under the other rules.
