Accessory Switch/Relay Question

My EZ Wire kit included a dash mount GM type keyed start switch, with the normal BAT-IGN-ACC-START lug connections. The wiring harness has a good sized (No 10?) ACC Power wire from the switch to the fuse block. I am seeing that if I use some other type of switch arrangement the ACC function needs to switch a relay. Is my understanding correct that the GM type starter switch has switching capability that will handle the high amp load of the accessories, so no relay is required; but if the accessories are switched independent from the starter switch the relay is necessary so that the on-off switch does not have to be so bulky (60 to 80 amp capacity)?

gm switch do not like a hi load i have burn up more then one. i use the switch to work the no/off relay and pull a #10 or better size # 4 off starter + to a small fuse block for fans and fule pumps with breaker s

Much better to use a relay than the switch

Click on this for good info on relays,I bought my 70 amp from them A+ quality too. www.watsons-streetworks.com/current_topic.html

That is a great article! Some things you just don't think about.