There still my be DANGER Will Robinson!

Amperage=Watts/Volts

Inductive Load:
Electrical devices generally made of wire that are coiled to create a magnetic field to produce mechanical work when energized. Examples of inductive loads include motors, solenoids, and relays. Inductive loads exhibit inrush of current when energized that can be many times the steady state holding current. When de-energized, the magnetic field collapses, generating a high voltage transient. This transient can cause arcing across mechanical switching contacts or can cause damage to solid-state contacts.

Inrush Current:
The initial surge of current through a load when power is first applied. An important specification to consider whenever evaluating an interface. Inrush current to an inductive load (solenoid, connector, etc.) is up to ten times the holding current.

Holding Current:
1) A specification of a load, especially an electromechanical load. The current that is drawn by a load while it is energized. Also called "sealed current" of a load. See "inrush current". 2) The current necessary to maintain a thyristor in the "on" state.

So it's basically like this; if you are using 1000 watts at 120v your amperage is at 8.333. Well within the bounds for the holding current or 15 amp system. Now when you add in the factor for inrush current with the 10 multiplier you now have 83.333 amps to deal with. With safety in mind, you may want to go with a 40 amp timer at a 220 voltage. This would bring the intermittent amps down to 43 during start-up....it's still a little bit over the mark but within safe limits. Remember also, most all household receptacles are also rated for 15 amp service!