Re: security camera power
Probably not, if is a Class 2 or 3 power supply. However there are other issues, such as:
Are you running the cables thru a suspended ceiling - it may require plenum rated cable.
Splices have to be accessbile
Riser cable is required in walls
You won't get correct answers from a radio depot type of store. Contact a low voltage contractor. Also you may need permits and inspections.