YES Electric

Do NOT backfeed your generator. Backfeeding is the tying of a portable generator directly to your home's electrical panel instead of using a transfer switch. It is dangerous. It is often illegal. And it should never be attempted under any circumstance.

Backfeed creates a very dangerous, and potentially deadly, situation for lineworkers. If your generator isn't installed properly, the resulting backfeed of electric current could kill or severely injure a lineman working to restore your power.