The purpose of this document is to provide guidelines that will enable the support of a wide variety of safety extra low voltage (SELV) limited power source (LPS) applications using remote power supplied over balanced twisted-pair cabling. Examples of such applications include LAN devices supported by IEEE Std 802.3 DTE Power@ wireless access points@ TIA-862 building automation and security devices like remote cameras@ IP telephone and multimedia devices supported by IEEE Std 1394-2008. The guidelines in this TSB are considered to be in addition to@ and not in place of@ the infrastructure specified in the ANSI/TIA-568-C series of Standards. The TSB covers the transmission and electrical parameters needed to support power over category 5e or better balanced twisted-pair cabling. The guidelines address various environmental conditions related to the installed cabling@ bundled cabling@ cabling in conduit@ different cabling categories and cable types@ and how these may impact the capability of balanced twisted-pair cabling to support remote powering. This TSB provides additional guidelines with respect to: a) parameters needed for remote powering; b) references to safety standards; c) different installation conditions that require special considerations; d) application considerations; e) mitigation considerations; and f) cabling configurations and related field test considerations The cabling systems detailed in this TSB are designed to be used to support SELV power@ as defined in IEC 60950-1. Safety (electrical@ fire@ etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this TSB.