Split-core CT, 400A, 400A:26.6mA, 25mm Hole Diameter, up to 400 MCM insulated wire size ESCT-025-400 ~section 2~ CT Type: Split-Core Max. Amperage: 400 amps Inside Diameter: 25 mm or 0.98 inches Outside Diameter: 70 mm or 2.76 inches Thickness: 18 mm or 0.71 inches Model: ESCT-025-400UL Certifications: CE, Approved by UL for use with our UL Listed Omnimeters Wire Gauge: For use on cable that is 400 MCM or smaller. It is best to measure your wire diameter in millimeters, rather than use the MCM wire size. This is because the insulation thickness varies materially from one wire manufacturer to the next. It is much better to oversize your CT than to undersize it. These 25mm Split Core CTs are easy to install: simply snap these current transformers around the wires being read. They are very compact and can measure the current used in the majority of residential electrical systems. These CTs are designed to be used in conjunction with our Omnimeter line of electric meters for any load from 1/4 amp to 400 amps. These CTs are so easy to install you may see an overall savings in reduced labor costs to offset the increased price of the split core format. These are very compact and economical for their level of accuracy (0.1% which is just a few watts). They have 15,037 internal turns, creating a 26.6 mA output at max. amperage. The CTs will fit on up to 400 MCM insulated wires. It is a good idea to measure your wires before selecting a CT model to be sure that they will fit. Use 1 CT for 120 volt single phase North American, or 230 volt 2-wire foreign systems Use 2 CTs for 120/240 volt single phase systems Use 2 CTs for 3-phase 3-wire systems (no neutral) Use 3 CTs for 3-phase 4-wire systems These CTs are UL and cUL Recognized and are approved for use with our UL listed meters, to be a complete UL Listed meter install. Each CT has a unique serial number, is individually tested, and indicates the correct orientation of the CT in relation to the load of the electrical system being metered. For more information about our products and services, we encourage you to visit our online Knowledge Base, which provides spec sheets, videos, tutorials, FAQs, diagrams, and more. Spec Sheet: Split Core, 25mm, 400A CT
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