Yes there are step by step threads... its not dangerous to build them if you follow directions and pay attention to what you doing ... and even if you dont and make a mistake, If you have fuses in your panel they or the miswired device just goes poof... You wont die or get zapped unless your handling the bare wires while they have power applied to them... some people are over cautios about everything they dont yet understand... You rarely learn anything if you avoid everything this way.
Fire can kill too can you be trusted to light a grill? just treat live electricity like fire and dont touch it...
Okay, this will appear strong (and in fact is). I truly mean no disrespect in writing it. I just feel strongly the building of a 240 Volt 30+ amp controller is being miss-portrayed. First, who am I to be able to comment on this:
1) I have a Bachelor's degree in Electrical Engineering
2) I have a master's Degree in Electrical Engineering
3) I just recently retired as the Chief Engineer of a large aircraft prototyping organization. I had technical cognizance over engineers, wiring and mechanical artisans, several wiring fabrication shops, two machine shops, aircraft hangars, etc. I was responsible for the technical excellence of over 100 aircraft prototype modifications a year.
4) I have designed power control circuits.
5)I have also seen, unfortunately, what can happen when mistakes are made with these levels of power.
I could go on but I think I have made my point. I am not one who does not "yet understand"... I completely understand what is involved...and here are my thoughts:
1) Someone, without electrical design/fabrication experience, building a control panel for 30+ Amps of 240 volts is dangerous and potentially life threatening.
2) IMHO it is irresponsible for anyone on this board to tell someone with no electrical experience they can safety build a high power electrical control system.
3) In the above post the explanations of "fuses" and/or miss-wired devises just going "poof", and not being a danger, is just ridiculous.
4) Also, the analogy to lighting a grill is nuts and shows the author is one of those folks that "don't yet understand"
5)Be very careful who you take electrical wiring advice from ....especially someone on the internet...remember you have no idea the validity of the info or the credentials of the person portraying themselves as an expert..This note of caution applies to my comments and thoughts also...