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UL 1459 Document Information:
Title
UL Standard for Safety Telephone Equipment
Underwriters Laboratories Inc.
Publication Date:
Sep 21, 1995
Scope:
These requirements cover telecommunications (telephone) equipment (see 3.49, such as telephone answering devices, residential telephone instruments, telephone dialers, cordless phones, key systems, and private branch exchange equipment, intended to be electrically connected to a telecommunication network that has an operating voltage to ground that does not exceed 200 V peak, 300 V peak-to-peak, and 150 V rms (see 3.27 and 8.1.12), and installed or used in accordance with the National Electrical Code, NFPA 70.
Special installation methods are required for equipment connected to wire-line communication facilities serving high-voltage electric power stations operating at greater than 1 kilovolt. These requirements do not cover the equipment used in the design of such installations. Special system design requirements, such as those covered by IEEE 487, A Recommended Practice for the Protection of Wire- Line Communication Facilities Serving Electric Power Stations, shall be followed to reduce the risks associated with wire-line communication facilities serving such power stations.
These requirements cover equipment, whether or not it is intended to be connected to supply circuits, with a nominal rms system voltage of 600 V or less.
These requirements do not cover telephone dialers that are utilized for emergency signaling functions.
These requirements do not cover Open Batteries as defined in 3.29.
If necessary, these requirements, or their intent, may be used directly or as a guideline to evaluate circuits intended for connection to a telecommunication network contained in products other than telecommunications (telephone) equipment. Where the component or end-product standard contains requirements to address the risks associated with connections to the telecommunication network, such as the Standard for Electronic Data Processing Equipment, UL 478, application of some or all of these requirements, or their intent, may not be necessary.
These requirements are not intended to cover the Standard for Protection of Electronic Computer/Data-Processing Equipment, NFPA 75 (National Fire Protection Association), requirements for equipment to be installed in computer rooms.
These requirements do not cover cellular telephones or other similar receiver/transmitter type devices. Equipment of this type shall be investigated under the requirements in the Standard for Radio Receivers, Audio Systems, and Accessories, UL 1270.
This Standard covers cell site equipment and similar equipment that forms the "base station" for a ceiiular communications network and typically incorporates the interface to the wired telecommunication network, controllers, amplifiers and transmitting/receiving equipment. These may be housed in a single cabinet or in a multi-cabinet system. Linear amplifiers, antenna frames, and the like, associated with the transmitíreceive portions of the system shall comply with the requirements for professional use video products.
These requirements do not cover centralized AC or DC power systems that exceed the limits for Level C (see Tables 28.1 and 28.2), including battery banks (plants), DC power supplies, rectifiers, motor/generators, and the like, that form part of these systems.
A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and endproduct requirements as determined necessary to maintain the acceptable level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard cannot be judged to comply with this standard. Where considered appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.
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