hmmm…now how far is Cypress from McKinney TX. I could probably sit down over a cup of coffee at the local starbucks and tell all your care to hear about electrical things…lol…but then again…who wants to hear all those things anyway.
I agree with Robert. You have to firmly establish you know what the difference is between 120V and 240V Nominal and as stated the difference in a single pole versus double pole OCPD. Do you know what OCPD is the acronym for?
Have you taken the online Electrical Training Module and successfully passed? As basic as it is it still provides good information.
If we assume you are referring to a 50 AMP Double Pole or Two Pole Circuit Breaker then you have 50 amps as the rating. You do not add single poles together and assume 100 amps.
Single-Pole Breaker gives you two wires that are 120V apart: a hot (Black) wire and a white (Neutral) wire. For simplicity sake the current on both wires is the rated ampacity of the breaker.
Double-Pole Breaker gives you two wires that are 240V apart. The two wires are typically (for this example) red and black. Again for simplicity sake the amount of current passing through any point in the circuit is limited by the rated ampacity of the breaker.
Lets say you have a single pole 20 amps circuit breaker you have the ability to load to 20 amps (non-continuously) but only at 120V. Now, install another single pole 20 amp circuit breaker right beside the first one…you happen to tie them together…nothing changes…you still have 20 amps of load ability (Non-Continuously) per phase, leg or line…how ever you choose to learn it.
This also still applies to the double pole circuit breaker…It still connects to each leg separately yet in a single device with regards to an AC system (single phase mind you for simplicity).
So with regards to calculating the loads…the NEC permits you to use section 220.55 and Table 220.55 as well. Notice that Note 4 is also applicable for use with branch circuit applications.
Here is my suggestion to you…go on Google and Type Charles Miller Range Calculations and you will get a very detailed series on all the calculations you would every want to know. Here you go…I will help you get started…http://www.ecmag.com/section/your-business/article-220-cooking-equipment-calculations-part-vi
OH…I also wanted to add something. Do not fall for the ole trick of giving you different values and then asking you what the minimum branch-circuit rating is for a 8 3/4 kW or more range.
210.19(A)(3) Household Ranges and Cooking Appliances. Branch circuit conductors supplying household ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances shall have an ampacity not less than the rating of the branch circuit and not less than the maximum
load to be served. For ranges of 8 3∕4 kW or more rating, the minimum branch-circuit rating shall be 40 amperes.