Has anyone spliced a out door nest camera to a power line in the house?
You mean instead of using the nest power adapter? It’s a 100-240AC to 5VDC 1.4 A so you do need the adaptor. You could splice the 5VDC from another source but depending the distance.
So it can be spliced in after the USB connector box directly in to the house power?
I am powering mine with poe
Can you explain further about the POE, as in how?
Your house power is 110VAC. The camera is 5VDC. So NO. Don’t splice it to your house power. Unless your house power is 5VDC.
Like this one?
Yup! Like this but I am using a nest cam outdoor instead: