A:  We use these to keep condensation off of electrical wire connections in an outdoor lamp post.   We also use them with our outdoor Christmas nativity set.  I would not recommend using them in a buried, non-moisture proof conduit.  Try heat shrink wrapped wire connectors, which can be submerged in water (like those used with water well pumps).

A:  Either one would work, I imagine. I used the large to bundle 3 wires together at each fixture (where the mediums would have worked just fine) plus the directional/zone "splits" in the cable runs. Bought the large just so I wouldn't need to buy 2 sizes.

A:  You will be fine with medium

A:  I purchased the Large package --- on the back of the package, it reads that 3 to 5 #12 wires can be inserted. I checked out King Innovation website the manufacturer site for DryConn connectors, and the Medium connectors are listed for 1 to 3 #12 wires.

A:  Hi MindyHB- If you are connecting more than 2 #12 wires, the Large Aqua Blue DryConn Waterproof Wire Connector should be used. If you are connecting 2 #12 with 1 #18, you should select the Medium Aqua Red connector, which can be found at The Home Depot here: https://www.homedepot.com/p/DryConn-Medium-Waterproof-Wire-Connectors-Aqua-Red-20-Pack-62214/202889876 For a full list of wire combinations, you can go to our website http://www.kinginnovation.com/pics/db/docs/37-wirecombinationsaquaseriesrevb.pdf Or feel free to contact us with questions at 800-633-0232

A:  I use medium for three wires and large for four wires.

A:  It's possible to connect the two different types of wires safely if you use a system called CU/AL, which look like small box shaped fittings, and they are meant to keep the wires from touching and corroding each other. Combining two dissimilar metals can cause a chemical reaction called electrolysis, which may lead to corrosion of the copper wiring, which ultimately is a fire risk. If I found aluminum wiring in my home I would remove it and replace it with copper wiring. Aluminum wiring in a residential setting is not really safe. It can easily overheat and cause a fire.

A:  Short answer....No. The connection is not rated for that purpose. There are connections that are rated for copper to aluminum wire. These are not it. Use this connection when splicing underground such as landscape lighting. Mark

A:  The DryConn Waterproof Wire Connectors are not listed for use with aluminum wiring. If you have any questions, feel free to contact us toll free at 800-633-0232 or by email at customerservice@kinginnovation.com

A:  Package says Copper to Copper only, do not use on Aluminum wire.

A:  Not for 220 underground. This connector is used for direct burial splices such as landscape lighting. If you want to splice underground (UF) cable there is a kit just for that. Where would you want to use this? Knowing how you will use this will help identify the product you need.

A:  I wouldn't not outside as it hasn't worked on invisible fencing nor on 110

A:  Yes, the product will work for 220 voltage.

A:  Hello- The DryConn Large Aqua/Blue Waterproof Wire Connector is UL Listed with a 600V rating. If you have any questions, please feel free to contact us toll free at 800-633-0232 or by email at customerservice@kinginnovation.com