I could use some advice on protecting my emergency power system which is now, finally, up and running. I have a Lister SL2 (8.5 HP) powering a ST5 generator head and a Lister SL1 (4.25HP) powering a Northern 2 pole, 2.9 KW head. both wired 240/120. I'd run the SL1 when I don't need the well pump or shop tools as its so easy on fuel and the SL2 when I need a little more power. I'd rather have the breaker/fuse trip under a load that gives me a good margin than come close to over loading either gen set or engine of either set. I've been running the SL1 for years without any such protection but since I've added the SL2 and overhauled the system and have been reading this forum I've learned CBs or breakers would a good idea. BTW, I got a qualified marine electrician friend to go through my whole system from my main 200 amp panel, six circuit transfer switch and back to the gen sets. What I need to add now is either CBs or breakers that gives a healthy margin for protection in case someone turns on the air compressor or table saw in the shop.