UL-294B:2015 pdf free download – STANDARD FOR SAFETY Power Over Ethernet (PoE) Power Sources for Access Control Systems and Equipment.
Collision Detection (CSMA!CD) Access Method and Physical Layer Specifications Amendment 3: Data
Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements, IEEE
802.3af. Note PoE is often used to denote generically PoE or PoE+.
3.13 PoE+ — A generic term referring to equipment conforming to the requirements of the Standard for
Information Technology — Telecommunications and Information Exchange Between Systems — Local
and Metropolitan Area Networks Specific requirements Part 3: Carrier Sense Multiple Access with
Collision Detection (CSMAJCD) Access Method and Physical Layer Specifications Amendment 3: Data
Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements, IEEE
802.3at.
3.14 POWERED DEVICE (PD) — An ethernet device that receives power through the ethernet cabling.
3.15 POWER INJECTOR (Alternative terms — Injector or Power Brick) — A powered device similar to a PoE midspan device, comprising three ports. These are:
a) Data in, typically from the network switch,
b) Data and power — nominal 48 or 53 VDC, out and
c) Line voltage from a utility supply.
When a power injector compliant to this standard is used with access control systems and equipment, that system and equipment shall comply with the Standard for Access Control System Units, UL 294. The output voltage, VPORT, of the power injector will comply with the requirements in the appropriate IEEE standard.
3.16 POWER OVER ETHERNET (PoE or P0E+) — A means to supply power to a network device over Category 5e or higher performance ethernet cabling. The power supplied to the device may or may not be on the same conductors supporting data.
3.17 POWER SOURCING EQUIPMENT (PSE) — The power supply that provides power to the Powered Device through the ethernet cabling. It may be an endspan device, such as a PoE enabled network switch, or a midspan device that is located in between the switch and the powered device.

4 Installation and Operation
Effective date for 4 changed from December 2, 2015 to December 2, 2018
4.1 Communications circuits
4.1.1 Where a product has provisions for connection to a telephone, or outside wiring as covered by
Article 800 in the National Electrical Code, NFPA 70, the product shall comply with the requirements for
Protection Against Overvoltage From Power Line Crosses described in the Standard for Information
Technology Equipment — Safety — Part 1: General Requirements, UL 60950-1.
4.1.2 Where the product is intended to, or under normal use conditions can come in contact with the equipment users, the product shall comply with requirements for Protection of Equipment Users From Overvoltages on Telecommunication Networks, described in the Standard for Information Technology Equipment — Safety — Part 1: General Requirements, UL 60950-1.
4.2 Location of Midspan PSE or Power Injector
4.2.1 The midspan PSE or power injector can be located at any point within the defined structured cabling channel compliant to the Standard for Balanced Twisted-Pair Telecommunications Cabling and Components, ANSI/TIA-568-C.2, between the network switch and the powered device (PD).
4.3 Cabling requirements
4.3.1 Performance category
4.3.1.1 Category 5e cabling is the minimum performance category recommended.
4.3.2 Cable conductor gauge
4.3.2.1 The minimum conductor gauge permitted to connect between the PSE or power injector and the PD shall be 26 AWG (0.13 mm2).