b'ELECTRICAL CODEpusheselectronsthroughconductorsFuses are simpler devices that also opengeneratemorethantheusualamount (usually wire, but also fittings such as athecircuitinanovercurrentsituationof heat. These types of faults are collec-light switch, to which wire conductors too much flow will burn the internaltively referred to as resistive (resistance) are connected). The flow of electrons isconductor in the fuse, which then opensheating faults. 2called current. Just as an increase in waterthe circuit.pressureincreasestheflowrateof1 Insulation is the protective sheath around a Electricalwiringinbuildingsis water, an increase in voltage increasesconductor (wire) that dissipates the little heat theelectricalcurrent(measuredindesignedforspecificloadcapacities,generated as electrical current passes through amperes, or simply amps). and wires are manufactured to dissipateit, and which also prevents accidental short the heat normally generated as currentcircuits with other conductors or adjacent Thesize(gauge)ofanelectricalconductive materials.wireconductorlimitstheamountofflows through the conductor. If a fault2 NFPA 921, Guide for Fire and Explosioncurrent it can safely conduct withoutoccurs,thecauseofthefaultcouldInvestigations: 2004, Section 8.9.2, p. 69.overheating.Thicker(heaviergauge) wires are able to safely conduct more current. The maximum capacity of a wire conductor circuit is referred to as its load rating, measured in amps. You can see the maximum load rating for a circuit by looking at a circuit breaker inadistributionpanel(theratingis marked on the toggle of the breaker).Aconductorisratedforits maximumcurrentloadbecauseof resistance. Resistance refers to anything that slows down the free flow of anServing Metro Vancouver for 120 years!electrical current. It can be caused byStrata Re-roofing Specialiststhe wire conductor itselfevery wireRoofing & Guttersproducessomeresistanceorbya load,suchasanelectricmotor.The604.370.6288most important thing to know about resistance is that it produces heat, andwww.crownroofingltd.comalthough every wire conductor warms fromheat,toomuchresistanceina#118-11860 HammerSmith Way, Richmond, BCV7A 5G1wire conductor can produce heat that isdetrimentaltotheconductorand itsinsulation. 1 Motorsandbulbsare designed to dissipate considerable heat; electrical wire conductors are not.The Shocking Truth About FaultsWhentoomuchcurrentisdrawn throughaconductorforexample, when too many appliances are pluggedAVAILABILITY AND FORMATS BITUMAR INC.CANADIAN ASPHALT INC. (MONTREAL) (HAMILTON, ON)into one circuita situation called over- PRODUCTS BULK BURPAKBULK Barrel (keg)(50 lb bags) (100 lb)currentmayresult.Fortunately,eachLOW ODOUR oxidized asphaltwith an odour inhibitor (suppressant) without electricalcircuitinaresidentialandany added PPA in the oxidation process. T2, T3, T4 T2, T3, T4 T2, T3, T4 T2, T3, T4Benets: Less polluting. The kettles and tankers stay cleaner. Mops last longer.commercialbuilding,designedandAsphalt ZEROpolymerized asphalt with a viscosity built to the present electrical code, isequivalent to LOW ODOUR oxidized asphaltT2 T2, T3 NA NAat a lesser temperature.protected from overcurrent by a circuitBenets: savings on propane, less smoke, no odour and improved adhesion.breakerorfuse.CircuitbreakersareSEBS LOW ODOUR Asphaltelastomeric asphalt with an odour inhibitor devicesdesignedtoopenandclose(suppressant) with a minimal elongation of 750% NA SEBSNA NABenets: The ideal asphalt for the laying of elastomeric membranes and fleece back750a circuit by non-automatic means andmembranes as TPO, PVC and EPDM or for a phenomenal adhesion of surface gravel. It can to open the circuit automatically on areplace urethane and glues at a lesser cost.predeterminedovercurrentwithout damage to itself when properly applied within its ratings (C22.1-20, Canadian Electrical Code, Part 1; Definitions). www.rcabc.orgl29'