romex2121,

Welcome to ECN!

Here is a quick and dirty response to the Load Calculation for Demand Factor Scenario of Six Electric-Only Clothes Dryers in Dwelling Unit(s):

*** NOTE: For this example, I am basing the Dryers at 6.0 KVA, 240V 1 Phase ***

6000 VA (6.0 KVA) = 25.0 Amps at 240V 1 Phase 2 Wire

6,000 VA (6.0 KVA) x 6 Dryers = 36,000 VA (36.0 KVA)

Per Table 220.54, Demand Factor for 6 Dryers = 75% (0.75)

36,000 VA x 0.75 = 27,000 VA (27.0 KVA)

27,000 VA ÷ 240V = 112.5 Amps

Demand for this part of a Load Calculation Database:

* 27.0 KVA
* 112.5 Amps

If you need practice, make up a few project examples and compile Load Calcs for each one - via what is outlined in NEC Article 220, along with the example Project Calculations found in Annex D (Annex D is at the back of the NEC Codebook); then post your scenario Projects' information + Load Calcs in this Thread, for review.

Good luck.

Scott

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!