3M Performance Plus Wire Connector, Flexible Steel Spring Connectors, 22-12 AWG, Tan and Yellow Color (T/Y+), Jug of 500

The best wire connectors out there. A Jug of yellow/beige and a jug of red/yellow are all you'll ever need. Good stuff. I've been an electrician for 30 years and these puppies have never disappointed me.

These are the best wire nuts on the market. Their inner spring and outer rubber/plastic construction allow them to really grip and stretch over the wire. Never had a call back due to a failed connection.

I have always liked 3M and this line is the best yet. Very compact and the live spring conforms to the wire bundle maintaining preasure as the wires expand and contract as they get warm from use.

I've used these for over a decade and never had any issues with connections. If you put them on right they wont come off.

Not cheap compared to good old fashion "Marette", but this is best wire nut ever. It hold tight like you wouldn't imagine and the "skirt" at the end of connector protect accidental ground/short circuit from any part of insulated wire if you stripped a bit too much.