It should be noted that the load calculated for a single dwelling or for dwelling units in an apartment building is not considered to be continuous.
#CALCULATE THE SERVICE DEMAND LOCAD HOW TO#
Note that Rule8-110 designates how to determine the living area.įor two or more dwelling units of row houses, the minimum ampacity of service or feeder conductors from a main service is based on the above demand factors for each single dwelling, excluding electric space heating and air-conditioning loads, plus the demand factors outlined in Rule 8-202(3).įor apartments and similar buildings, the minimum ampacity of service or feeder conductors from a main service is calculated according to Rule 8-202.As with single dwellings and row houses above, the basic load is based on living area plus the demand factors for various other loads as outlined in Rule 8-202 (1 to 4). The second criterion is to use a basic load of 100 A if the floor area is 80m2 or more, or 60 A if the floor area is less than 80 m2. The methods for determining demand factors for dwelling units are divided intosingle dwellings and apartment and similar buildings.For single dwellings you are given two options depending on the size of the dwelling.In the first criterion, where the living area of the dwelling exceeds 90 m2, the basic load is 5000w and additional loads are added with various demand factors as listed in Rule8-200 (1)(a)(ii to vii). Although the various options and conditions may seem complicated, methodically working through the demand factors for each type of occupancy will allow you to determine the correct ampacity for service or feeder conductors. The Services and feeders section outlines the methods of calculating the minimum ampacity of service or feeder conductors for various types of occupancies. This is based on the ampacity of the service and whether a central electric furnace is intended. Where additional loads are added to an existing service or feeder, Rule 8-106(9) permits the load to be calculated by adding the sum of the additional loads to the maximum existing demand load measured over 12 months.Other demand factors can be based on demonstrated load calculations by a qualified person, as determined by the authority having jurisdiction.Īnother function of this section is to outline the number of branch circuit positions needed for dwelling units.
Rule 8-104 describes the rating of a circuit (feeder or service) and establishes the criteria between the calculated load and circuit (feeder or service) rating. It provides you the information you need to selectthe rating of a circuit, feeder or service (i.e., ampacity of the circuit conductors and rating/setting of the circuit over current devices). Section 8 is a general section of the code. This is not intended to replace the notes in Appendix B or the explanations of individual requirements contained in the CEC Handbook,* but will hopefully provide some help in navigating the Code. In this article: Section 8 - circuit loading and demand factors.
#CALCULATE THE SERVICE DEMAND LOCAD SERIES#
This series of articles provides a guide to help users find their way through this critical document. Sometimes it can seem quite daunting to quickly find the information you need.
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