Low-Voltage Electrical Service

1 Coordinated by Communication avec la client le for vice-pr sidence R seau de distributionLow-Voltage Electrical ServiceStandard EditionJune 2014 LLow-Voltage Electrical Service Standard 10th Edition June 2014 Hydro-Qu bec, June 2014 All rights reserved. Reproduction authorized only for educational purposes, with acknowledgment of des mati resIntroduction 70 General Information Application Units of measure Definitions 11 1 Administrative and Technical Information Administrative information Demande d alimentation et d claration de travaux form Charges Responsibilities of the master electrician Technical information General Available voltages and limits on supply from power line Supply over one or more distribution Service loops Metering equipment 29 2 Overhead Service Number of Service entrances per building New Service entrance Service entrance modifications Total load and conductor size Spool rack Supply and installation Location Clearances Distance between spool rack and Service

2 Head Common spool rack Distance between two spool racks Mechanical strength Height of spool rack Conductor clearance above roofs Distance between spool rack and telecommunications wires Ice fenders above conductors Common support Service entrance Length of conductors at Service head Service mast Length of Service mast Metal conduit with PVC section Insulation of neutral conductor Service entrance modification One connection point More than one connection point Service entrances on existing rooftop support structures Reconnection by a master electrician Service loop Supply and installation Clearance Service loop provided by customer Supply and installation Conditions Connection point Access to connection point Location Clearance around parts of a building Connectors Overhead-underground Service entrance Technical requirements Connection point Connection of equipment Technical requirements Connection point 47 3 Underground Service Service entrance Individual meter socket Multiple-meter mounting device Junction box Connection box for flat-rate Service Connection point In the meter socket In the multiple-meter mounting device In the junction box In the connection box for flat-rate Service In the customer structure Underground conduit system Conduits Description Conduit entrance Conduit compatibility Riser conduit on an exterior wall Expansion joint and

3 Adapter Inspection and cleaning Cable-pulling rope Conduit sealing Repair of above-grade conduit systems Pullbox and junction box Use Location of pullbox or junction box Specifications Supply and installation Access and clearance Placement of conduits Buildings with no basement Plan required for special cases Connection box for flat-rate Service Use Supply and installation Specifications Service loop Supply and installation Customer s handhole Customer s manhole Service loop beneath or inside a building Clearances Connection Lugs 58 4 Temporary Service Application Service requirements Overhead Service Underground Service 604 5 Metering Types of metering Choice of metering equipment 120/240-V delivery point Current rating of 200 A or less Current rating of more than 320 A 120/208-V delivery point Current rating of 200 A or less Current rating of more than 200 A 347/600-V delivery point Current rating of 200 A or less Current rating of more than 200 A 600-V delivery point Service entrance equipment clearances General Disconnect devices Transformer enclosure Combustible gas exhausts or vents Grouped or outdoor metering equipment Grouping of equipment for different voltages Enclosures or equipment assemblies approved for outdoor use Equipment on supply side of metering equipment Protection of metering equipment Permanent platform and

4 Fixtures Customer-owned Low-Voltage transformers Fire pump Permanent identification of Service entrance equipment Identification marking Methods of identification Identification of Service entrance conductors Safety precautions Padlocking Zero-voltage testing 705 6 Self-Contained Metering Meter socket supply and installation Meter socket specifications Location of meter sockets Height of meter socket 120/240-V delivery point Accepted meter sockets Individual meter sockets and multiple-meter mounting devices Grouped supply Metering centre 120/208-V delivery point Accepted meter sockets Meter socket location and installation 347/600-V delivery point Accepted meter sockets Meter socket location and installation Metering centre location and installation Zero-voltage testing 77 7 Metering Equipment with Transformer Enclosures Supply and location of metering equipment Master electrician s responsibilities Hydro-Qu bec s responsibilities Transformer enclosures Accepted transformer enclosures Transformer enclosure specifications Transformer enclosure location Transformer enclosure height Conduits Power conductor conduits Conduit for metering conductors Service entrance conductors Meter Location of single-phase meter Location of three-phase meter Zero-voltage testing 826 8 Metering Equipment with Metering Compartment Supply and location of metering equipment Responsibilities of the

5 Master electrician Hydro-Qu bec s responsibilities Metering compartment Applicable standards Metering compartment specifications Conduit from metering compartment to transformer enclosure or outdoor cabinet Transformer enclosures Height of transformer enclosures Outdoor enclosures Location of outdoor enclosures Specifications of outdoor enclosure Zero-voltage testing 88 Figures Tables Job Aids Index77 Introduction The conditions governing Electrical Service are laid out in the document Conditions of Electricity Service as approved annually by the R gie de l nergie. Standard (this document) covers Low-Voltage electricity supply and is based on the document above and on the Hydro-Qu bec Distribution standards in effect.

6 It takes into account the conditions of application stipulated in the Qu bec Construction Code, Chapter V Electricity ( , latest edition), hereinafter the Code . The following three standards are also based on the above documents: , Service d lectricit en basse tension partir des postes distributeurs ( Low-Voltage Electrical Service from distribution substations) in French only; , Service d lectricit en moyenne tension (medium-voltage electricity Service ) in French only; , Electricity Metering for Medium- and High-Voltage Installations. This 10th edition of Standard went into effect on June 30, 2014. It is designed to provide employees, master electricians, consulting engineers and manufacturers with information on implementing or modifying Low-Voltage installations.

7 It is also meant to facilitate relations between Hydro-Qu bec and its customers regarding such matters. Qu bec regulations take precedence over this Standard in case of conflicting interpretations, and the French version takes precedence over the English version in the event of Sayegh, Eng. Director System Policies and Planning Vice-pr sidence R seau de distribution Hydro-Qu bec Distribution Andr Potvin, Eng. Director Metering Infrastructure and Technological Solutions Hydro-Qu bec Distribution 88 The content has been approved by a Hydro-Qu bec Distribution task force and the technical content checked and validated by the engineers below: Chapters 1, 2, 3 and 4: Jacques C t , EngineerChapters 1, 5, 6, 7 and 8: Denis Deslauriers, Engineer Dany G n reux, Engineer The content has also been validated by the following outside parties: Corporation des ma tres lectriciens du Qu bec (CMEQ)Michel Bonneau Director Direction des services techniques et SST Imed Laouini, Eng.

8 , Ph. D. Technical Advisor Direction des services techniques et SST R gie du b timent du Qu bec (RBQ)Gilbert Montminy, Eng. Manager, Electricity Sector Direction de la r glementation et de l expertise conseil Charles Pineault Technical Advisor Direction de la r glementation et de l expertise conseilThe content has been approved by a Hydro-Qu bec Distribution task force and the technical content checked and validated by the engineers below: Chapters 1, 2, 3 and 4: Jacques C t , EngineerChapters 1, 5, 6, 7 and 8: Denis Deslauriers, Engineer Dany G n reux, Engineer The content has also been validated by the following outside parties: Corporation des ma tres lectriciens du Qu bec (CMEQ)Michel Bonneau Directeur Direction des services techniques et SST Imed Laouini, Eng., Conseiller techniqueDirection des services techniques et SST R gie du b timent du Qu bec (RBQ)Gilbert Montminy, Eng.

9 Responsable du secteur lectrique Direction de la r glementation et de l expertise conseil Charles Pineault Conseiller technique Direction de la r glementation et de l expertise conseil8 The content has been approved by a Hydro-Qu bec Distribution task force and the technical content checked and validated by the engineers below: Chapters 1, 2, 3 and 4: Jacques C t , EngineerChapters 1, 5, 6, 7 and 8: Denis Deslauriers, Engineer Dany G n reux, Engineer The content has also been validated by the following outside parties: Corporation des ma tres lectriciens du Qu bec (CMEQ)Michel Bonneau Director Direction des services techniques et SST Imed Laouini, Eng., Ph. D. Technical Advisor Direction des services techniques et SST R gie du b timent du Qu bec (RBQ)Gilbert Montminy, Eng.

10 Manager, Electricity Sector Direction de la r glementation et de l expertise conseil Charles Pineault Technical Advisor Direction de la r glementation et de l expertise conseil9 General Information Chapter 0 0 General Application The purpose of this Standard is to describe the technical characteristics and requirements applicable to Low-Voltage Service supplied directly from a line anywhere within the territory served by Hydro-Qu bec Distribution. It also describes the technical characteristics and requirements for metering elec-tricity at a rated ampacity not exceeding 6,000 A. The requirements herein are applicable to new installations as well as to any modification of a customer s Service master electrician finding it impossible to comply with this Standard must, before carrying out work, contact a Hydro-Qu bec representative at 1 877 COURANT (1 877 268-7268) to agree on a solution.