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	Subject - can i ask some ggb fairly simple questions, that may sound stupid to most with experience? i work for a residential electrician who dosent like taking time to answer many questions..... especially questions from a beginner. i am still in college and i work for him as much as i can, but i would really like to learn the trade ( all aspects, not just wiring rooms and kitchens... i got that down). i have some questions about panels, loads, and meter packs mostly. Ryan_J Ask away.... JimmyDee That is why we are here. We just don't want you to do a house design from this site. We are not a replacement for an on the job training program but since you are in a training program of sorts, go for it. BTW, welcome to the site. Jim ggb i promise i am not trying to use this for any replacement ! my major is electrical engineering and my boss dosent want to teach anything new..... he will leave me in a house to lay it out, wire it (homeruns and everything)...... then he will set meter packs, panels, and run the service......... i am to the point now where i want to watch and him teach me all that stuff. like how do you know whether to use 2 awg or 4 awg on a house, what determines whether you use a 150 amp or 200 amp main. just stuff kinda like that! lctrc789 GGB Main service panels are figured by a calcualtion that is kind of difficult to explain, but you could learn from reading the code book and of course asking.LOL As far as wire size for panels you can go by the NEC article 310 15 b6 2003 book, but this guidleine may be superseded by local utility company or inspector. Always check with them for local codes and grounding procedures. All localities are different and the only real way to learn these is to know what they require in your local area. All things are learned in a period of time and knowledge, it is to bad your boss doesn't want to take time to show you. I hope some of this has helped and you can always ask these guys and gals here are very knowledgeable. Good luck JimmyDee Click Here for calculator Here is a link for a calculator to figure the minium size home service panel. Residential wire size for a service was mentioned in post above. Jim