Power Over Ethernet Cable Length Limit

A standard ethernet segment is limited to 328 feet 100 meters in length over standard gauge cat5 cable.

Power over ethernet cable length limit. Power over ethernet or poe describes any of several standards or ad hoc systems that pass electric power along with data on twisted pair ethernet cabling. There are a few different versions of ethernet cable but they all have a maximum distance of 100 meters 328 feet. Ieee 802 3af 2003 type 1 poe. This allows a single cable to provide both data connection and electric power to devices such as wireless access points waps internet protocol ip cameras and voice over internet protocol voip phones.

However the poe has limited of 100 meters which has relative to both network communicating and voltage drop of the power. It provides up to 15 4w power at voltage range from 44 0 57 0v. The furthest distance a poe switch can transmit simple data over ethernet is a distance of 100 meters. Power over ethernet standards and applications the ieee institute of electrical and electronics engineers standards for power over ethernet are 802 3af 802 3at and 802 3bt the detailed features are presented as follows.

The limitation is not the power. The poe provides the solution to transmit the power and network communicating over single ethernet cable. It s the ethernet cabling standards that limit the total length of cabling to 100 meters. Yes power over ethernet poe will will only power the unit so long as there is enough voltage to power the unit at the end of the cable run.

It should be noted that cat7 cable has harsher distance limits than cat5e cat6 and cat6a. The new 2ghz speed limit finally category 8 is the new spec on the cable block. The maximum distance you can power a device will vary depending on the access point and the voltage it requires as well as the voltage provided by the power supply and the quality of the cable. It saves the installation cost.

That restricted reach can severely limit the viable locations where system designers and implementers can operate a remote ip enabled device. In the ieee802 the maximum network distance is 100 meters between two ip devices. Also aimed at data centers and requiring high speed gear the cables run at 1 or 2ghz and can move up.