Portable generators are not designed for powering your home's electrical system. Never try to power your house wiring by plugging the generator into a wall outlet, a dangerous practice known as backfeeding. It sends power from your house back through electric lines. Backfeeding could ruin appliances, cause a fire, or even injure or kill a co-op employee who might be working on nearby lines.
Energizing your home wiring without proper disconnects in place can energize the line creating a major hazard for line workers and for the general public who might be exposed to downed power lines.
Any connection for a generator to power your home should be made by a licensed electrician to ensure that the wiring and connections are correct and that proper safety disconnects are in place.