Thomas & Betts 166LRF 15KV 200A LB ELB PROBE W/WRENCH

The 166LRF is a loadbreak elbow probe, the replaceable arc-follower insert that threads into a 200A loadbreak elbow connector and does the actual making and breaking of the circuit. It's rated 15 kV, 200 A, and it ships with the installation wrench you need to torque it into the elbow. Utility and industrial electricians buy these as consumables: after a number of load-make/load-break operations the probe erodes and gets swapped rather than replacing the whole elbow.

No. The 166LRF is a 15 kV, 200 A loadbreak probe and it only belongs in 200 A loadbreak elbow connectors. 600 A apparatus uses deadbreak connectors, which are a different interface entirely and have no loadbreak probe. If your gear is 600 A, or if the elbow is a deadbreak 200 A type, this is the wrong part.

Stay at 15 kV. The 166LRF carries a 15 kV voltage rating, so it's matched to 15 kV class 200 A loadbreak elbows. A 25 kV class elbow needs the probe rated for that class. Using a lower-class insert in higher-class apparatus isn't a substitution you can make in the field.

It's the probe only, not the elbow. The 166LRF is the loadbreak probe insert that goes into a 200 A elbow connector, so if you need the complete elbow you're ordering a different part and this alone won't terminate a cable. Buy the probe when you're refurbishing an elbow that has taken switching duty and the arc-follower is spent.

No, the wrench comes with it. Each 166LRF is sold with the installation wrench, and it's sold individually rather than in a pack, so one order gets you one probe plus the tool. If you're stocking spares for a crew, you'll accumulate a wrench with every probe.

Match on the manufacturer part number 166LRF from Thomas & Betts, and check it against the elbow's class: 15 kV, 200 A loadbreak. Probes are not interchangeable across voltage classes or between loadbreak and deadbreak interfaces, so the elbow you're servicing decides the number. Only the one model is offered here, so there are no finish or length options to specify.

Minus 20 to plus 65 degrees C. That covers outdoor padmount and vault work in most of North America, but it's worth knowing on the cold end: in a hard winter climate the EPDM rubber insulation on the probe assembly is only qualified down to -20 C, so handling and installation in colder ambients is outside the stated range.

EPDM rubber, both for the insulation and for the body material of the part. EPDM is the standard elastomer for medium-voltage separable connector components because it holds up to ozone, moisture, and UV in padmount and vault environments. It also means the usual handling rules apply: keep petroleum-based lubricants off it and use only the silicone lubricant specified for elbow assembly.