Originally Posted by davel1971
I understand that, but a 15amp should blow at 12-13amps, that sure won't melt a 30 amp plug
Howdy davel1971, I'm not sure I am following you here.
As stated, not all circuit breakers trip at their specified amperage, as the article points out. If they always tripped on the low side, then you may not see the overheating. However, when they don't trip till the amps are high for the cords/adapters, then you are going to see melted plugs, similar to the OP. There are also other factors that can come into play. Besides loose/bad connections.... Lengths of extension cords/low campground voltage can increase amperage.
It has even been pointed out in these forums a few times, that not all the chinese made adapters are up to par, and melt easier since they aren't UL rated like the better adapters are.
Here is another article concerning this with more links:
Why Did My R.V. Adapter Plug Melt? My 125V 30A to 125V 15A got very hot.
The OP has since stated he was actually using an adapter to plug into a 50 amp connection, so my guess at the time doesn't apply now, but if he doesn't mind us carrying on this conversation.......we can continue it here.
Eklc, if you consider this a thread hijack, I will move it over into it's own thread.
One of the more important things, and has been pointed out here which would apply to the use of any adapter..... is to limit your loads in the RV to make sure you don't exceed the max amps of the RV or outlet.
If using a 30 amp RV, don't exceed 30 amps when plugged into a 30 amp or 50 amp (with adapter) outlet.
If plugged into a 15 amp (with adapter) don't exceed using 15 amps worth of stuff (an air-conditioner can sometimes cause problems here).
Same rules apply with a 50 amp RV, and using adapters to plug into 30 or 15 amp outlets.
It's a good idea to learn and get a good guesstimation of just how much power each thing in the RV consumes...and thus physically limit yourself......and not just place pure blind faith in a breaker tripping.