Question: are all dryers 30 amp?
Answer: As long as the dryer cord itself is rated for 30 amps, be it in 3 or 4 prong form and making sure the breaker/wire is the same. If the wires coming out of the panel/junction box is 4 wires, it needs to be 30 amps for an ELECTRIC dryer. Same as if it was 3 wires. ... However, this isn't for all gas dryers.