hvac adaptor cord:heavy adaptor cord compatible with yellow jacket 69522 hvac tools clearance and equipment circuit breaker finder curcuit finder accessory kit compatible with rt250, et300 et310: amazon.com: tools & home improvement HVAC Adaptor Cord Heavy Adaptor Cord Compatible with Yellow Jacket 69522 HVAC Tools Clearance and Equipment Circuit Breaker Finder Curcuit Finder Accessory Kit Compatible with RT250, ET300 ET310... in the past