Whats special about a porcupine?   The porcupine has specially designed hairs that are barbed spines which will spear and then detach in the face of any predator that tried to bite it. For a cute little w â¦ addler they are actually quite dangerous and should be approached (if at all) with caution. 2 people found this useful. Answered.
We regularly run two 1500 watt heaters in a 30 amp RV. Just be sure that each heater is on s different circuit. A 30 amp RV will usually have a pair of 15 or 20 amp breakers installed. If you go to run another applaince on the circuit with the heater, it will trip once you exceed the 15 or 20 amp breaker limit.
Calculating Energy Usage. An average water heater runs three hours daily. An 50-gallon, 5,500-watt water heater with a .90 EF and an electricity rate of $.16 per kilowatt hour will cost $781 to operate each year.Most water heaters include a label listing the annual operating cost.or electric heaters, EF ranges from 0.75 to 0.95. The amount of electricity used by an electric water heater depends on the size of the water tank, the amount of water used, the temperature setting of the water heater, and whether the tank is insulated.