To follow up on Dr. Joe's post, if you really don't know what you're doing, I'd suggest going by the electrical rules from 2004. You can read them here:
http://www.team229.org/fm/2004/5.2.7 They are more restrictive, but that will save you if you don't know what you are doing.
The reason they didn't use to allow the globe motors to be hooked up to spikes is the spikes are only rated for 20 amps, while the globes draw a little more then that at stall. If you do want to use a spike for the globe motor, make sure the mechanical design is such that you will never stall the globe motor. Better yet, just use a speed controller.