You need to make sure your Switch supports POE (power over Ethernet).
its called power over ethernet and yes they do
A box is installed in the patch cabinet and 2 ethernet cables are run to the Wireless access point
Let's just clarify a thing or two: Most networking equipment uses AC power. All routers and switches (or, at least 99% of them) must be powered from an AC wall outlet. However, a wireless access point or an IP telephone may receive power from it's attached ethernet cable. Where does the power come from? The device on the other end of the cable must be supplying power through the cable. This is called PoE (power-over-ethernet) and there is at least one IEEE standard for this, and one Cisco-proprietary standard. Typical devices that can supply power are switches (not all switches) and power injectors. A power injector is a palm-sized device that you insert between a non-PoE switch and a client device to inject power into the ethernet cable. The injector must be wall powered to function. Some routers, particularly ISR (integrated services routers) routers can suypply PoE, too. So, usually routers do not receive PoE. Often, switches provide PoE. Usually, access points receive PoE. Make sense?
