UL 2735:2022 free download

UL 2735:2022 free download STANDARD FOR SAFETY Electric Utility Meters for Canada
1 Scope
1.1 This Standard covers the electrical safety of electricity meters rated up to 600 VAC, which measure, monitor, record, transmit, or receive electrical energy generation or consumption information.
1.2 Meters covered by this Standard may be provided with one or two-way communication capabilities, by means of carrier signals, telephone, cable, wireless communication, or other methods.
1.3 Meters covered by this Standard may additionally provide signals, either by direct connection or wirelessly, for the control of electrical loads or electrical power generation equipment in response to signals received from the utility or local communication networks.
1.4 This Standard applies to detachable meters (Type “S” meters or “S-base” meters), and bottom- connected meters (Type “A” meters or “A-base” meters), intended for installation in ordinary (non- classified) locations. These may or may not be intended to be under the exclusive control of the serving utility.
1.5 This Standard does not apply to equipment intended as test equipment or equipment intended to make measurements for analysis in a laboratory or industrial setting. 2 Definitions
2.1 For the purpose of this Standard, the following definitions apply.
2.2 ACCESS PANEL – A panel or door that may be opened or removed to provide access to a portion of the meter interior.
2.3 ACCESSIBLE (part) – A meter part, conductive or non-conductive, which may be touched in normal use when the meter is installed as specified by the manufacturer, with the meter cover in place.
2.4 AUXILIARY (control) POWER SUPPLY – An electrical power supply of the meter, provided via dedicated terminal(s) in addition to the measurement terminals. NOTE: The auxiliary power supply terminals of the meter are intended for connection to a power source separate from the measured circuit(s). For example, this type of power supply is used in applications where a meter is expected to operate when the measured circuits may be de-energized or function outside of the normal operating range of parameters (e.g. power quality monitoring).
2.5 AUXILIARY WIRING LEADS (of the meter) – Connections of meter communication ports, input/output ports, auxiliary power supply or other auxiliary ports provided on cables leaving the meter enclosure through an opening in the meter base.
2.6 BASE – The back portion of a meter that mates with the meter cover to form a complete enclosure, which supports the terminals, a hanger if provided, and provides support for sealing to the cover.
2.7 BOTTOM-CONNECTED METER (Type “A” meter or “A-BASE” meter) – A non-detachable meter that is connected using wiring terminals on the bottom of the meter.
2.8 CLEARANCE DISTANCE – The shortest distance in air between two conductive parts.
2.9 COVER – A lid or equipment covering used to protect the measurement components of a meter from external elements while allowing the viewing of the dials and nameplate information. A cover may contain other components which may be required for resetting demand and electronically reading the meter §