Cut Sheet

D-22
WWW.IDEALINDUSTRIES.COM 1-800-435-0705 CUSTOMER ASSISTANCE
TesT & MeasureMenT
replaCeMenT parTs/safeTy
Replacement Parts Selection Guide
Safety in the Field
Thepowerdemandsoftoday’shigh-techworldhavecausedamarkedincreasein
occurrencesandlevelsoftransientovervoltages.TheInternationalElectrotechnical
Commission(IEC)hasdevelopedasafetystandardsmodelformeasurement,controland
laboratoryuse.
Category I–Thesignallevelfortelecommunications,electronicandotherlow-energy
equipmentwithtransient-limitingprotection.Peakimpulsetransientrangeis600–4,000volts
witha30ohmsource.
Category II –Thelocallevelforfixedandnon-fixedpowereddevicesincludingappliances,
lightingandportableequipment.Outletslocatedmorethan30feetfromCATIIIsourcesand
60feetfromCATIVsources.Peakimpulsetransientrangeisfrom600–6,000voltswitha12
ohmsource.
Category III –Thedistributionlevelforfixedprimaryfeedersorbranchcircuits.Circuits
thatareseparatedfromCATIVsourcesbyatleastoneleveloftransformerisolation.Peak
impulsetransientrangeis600–8,000voltswitha2ohmsource.
Category IV (proposed)–Theprimarysupplylevelforthehighestlevelsoftransient
overvoltage.Includestheutilityservicebothoutsideandattheserviceentrance,servicedrop
fromthepoletothebuilding,overheadlinetoremotebuildings,andundergroundlinetoa
wellpump.Peakimpulsetransientrangeis600–12,000voltswithlessthana1ohmsource.
CAT I
Copiers
• Electronic
equipment
• Low energy
equipment with
transient limiting
protection
CAT II
Appliances,
PCs, TVs
• Outlets and long
branch equipment
• All outlets at more
than 10m (30 ft)
from Category III
source
• All outlets at more
than 20m (60 ft)
from Category IV
source
CAT III
MC Panels
• Feeders and short
branch circuits
• Distribution
panel devices
• Heavy appliance
outlets with “short”
connections to
service entrance
CAT IV
Exterior
Tr ansformers,
Meters
• Outside and
service entrance
• Service drop from
pole to building
• Overhead line to
detached building
• Underground line
to well pump
Service
Entrance
Service
Entrance
Meter
Meter
Meter
Transformer
Outbuilding
Underground Service
Service
Entrance
Outbuilding
Underground Service
METER REPACEMENT PARTS
SELECTION GUIDE
090 310 340 360 480 490 600 610 700 740 760 770 790
61-096 61-310 61-312 61-340 61-342 61-361 61-484 61-486 61-497 61-498 61-605 61-610 61-614 61-702 61-704 61-744 61-746 61-763 61-765 61-773 61-775 61-795 61-797
FUSES
F-1 0.5A (250V) 6.35 x 38mm •
F-105 1A (600V) 10.3 x 35mm •
F-310 250mA (250V) 5 x 20mm • •
F-312 500mA (250V) 5 x 20mm •
F-314 10A (250V) 5 x 20mm •
F-340 0.5A (500V) 6.35 x 32mm • •
F-341 10A (1000V) 10 x 38mm • •
F-497 440mA (1000V) 10 x 35mm • • • •
F-498 11A (1000V) 10 x 38mm • • • •
F-797 315mA (1000V) 5 x 32mm •
LA-3893 2A (600V) 6.35 x 25.4mm •
LA-3898 0.25A (500V) 5 x 32mm •
BATTERIES
61-201 1.5V (LR44) •
— 1.5V (AA) • • •
— 1.5V (AAA) • • • • •
— 9V • • • • • • • • • • • • • • •
TEST LEADS
TL-34 Leads w/pin connectors •
TL-56 Test leads •
TL-95 Test leads •
TL-100 Test leads w/alligator clips • • • • • • • • •
TL-102 Silicone test leads • •
TL-104 Test leads w/large alligator clips • • • •
TL-310 Test leads • •
TL-795 Test leads •
TL-797 Test leads •
Safety in the Field
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