This is what you will need for a connector since the contacts incoming will be 'Hot' and have to be protected,
AND,
The socket going into your electrical system will have to be protected also, since they stand a chance of being 'Hot'...

You might not need one this large, but you will need something very similar.
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The safest way to connect your generator to a home breaker panel is with an 'Interlock' or 'Lockout'.
There are some different types, but mine looks like,
An electrical box you install before your main breaker box,
With two 'Main Breakers' side by side.
There is a metal bar that has a flat sliding 'Tab' on it that will only let you have one breaker 'ON' at a time.
One breaker is connected to the outside 'Grid' service,
The other is connected to the generator.
Very simple and practical, you simply CAN NOT have the Grid power and the Genset power on at the same time!
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This is a schematic/diagram of a 'Transfer Switch' for home generators.
And here is the web site I stole that from,
http://www.smps.us/transferswitch.html
Here are some sources, articles...
http://www.generatorjoe.net/ts.asp?gclid=CNzf09ewqpYCFQObFQodox2Ixg
http://www.ronhazelton.com/howto/home_generator_installation.htm
http://mayberrys.com/honda/generator/html/transfer.htm
http://www.gen-tran.com/
http://cvfsupplyco-store.stores.yahoo.net/mahogetrsw.html
http://www.steadypower.com/catalog/rc_intro.php?gclid=CISN1f2uqpYCFQIWFQodJ2jVyg