multiple receptacles in one 3-gang box?
I wanted to increase the number of outlets in one small location where I already had a single 15A GFCI receptacle. I bought a 3-gang plastic box and two new 15A duplex receptacles. I removed the original single-receptacle box and replaced it with the new 3-gang box, then installed the GFCI and the two new receptacles side by side in the 3-gang box. The LINE side of the power goes to the GFCI like it always did, then the LOAD terminals are connected to the second receptacle in the box via 8 inches of insulated 14g solid copper wire, then from that second receptacle to the third. All of the outlets are grounded to the same ground, they're all protected by the GFCI by being on the LOAD terminals, they test fine and work fine, and I thought it was a great success. BTW, the electrical load on the circuit is very low.. there are some small electronics like a clock radio and a phone always plugged in, and then I'll occasionally use a device like an electric beard trimmer. It looks just like this except 3 receptacles instead of the 2 pictured... ( http://tinyurl.com/3jbyfm8 )
I mentioned my project to the "electrical department" employee of the local hardware store. He said that it does not meet code to have more than one receptacle in a 3-gang box. He said I could literally place three single boxes next to each other in a row, with one receptacle per box, and it would meet code, but not three receptacles in one 3-gang box.
I've tried to research this subject online but have found no solid answer. Obviously I've seen quad-receptacles like this ( http://tinyurl.com/3zcmzhl )... so what's the difference? And they sell cover plates at the same hardware store specifically designed to cover three receptacles side by side... ( http://tinyurl.com/3quhzgy )... so what gives?
I hope a qualified electrician can offer me some information as to why it is or is not code, and if it is not, what I can do to place 3 receptacles right next to each other on the wall but still meet code. Can I literally place three single-unit boxes next to each other in the wall? Do they need to have a certain amount of space between them or a certain length of 14-2 wire between them? Or is the way I did it actually ok?