Wirenuts... or twist connectors, are NEC (national elec code) approved... for specific wire size groups to specific color wirenuts.
First, be sure NONE of the wires are aluminum... that requires a special wirenut.
There is a specific length of the wire that needs to be bare (stripped).
Hold all the wires in one hand, with the ends parallel and the tips even, then twist all three of these bare wires together with linemans pliers (cutters) for a neat and clean twist... be sure the twist is 'clockwise'.
Then apply the wirenut onto the twist.
If you really want to make it secure, get some NoLux and put a small amount onto the twisted set. NoLux is basically silicon grease with carbon particles in it (messy). It coats the wires and both protects from corrosion as well as improving electrical conduction. Thing is... if the connection gets 'hot' the NoLux can run... thus creating a conductive path. So do not over-apply.
If it were me, I would tape up each large wirenut joint... just to hold it together and keep it separate from the others.
Hope all this helps...
GA
First, be sure NONE of the wires are aluminum... that requires a special wirenut.
There is a specific length of the wire that needs to be bare (stripped).
Hold all the wires in one hand, with the ends parallel and the tips even, then twist all three of these bare wires together with linemans pliers (cutters) for a neat and clean twist... be sure the twist is 'clockwise'.
Then apply the wirenut onto the twist.
If you really want to make it secure, get some NoLux and put a small amount onto the twisted set. NoLux is basically silicon grease with carbon particles in it (messy). It coats the wires and both protects from corrosion as well as improving electrical conduction. Thing is... if the connection gets 'hot' the NoLux can run... thus creating a conductive path. So do not over-apply.
If it were me, I would tape up each large wirenut joint... just to hold it together and keep it separate from the others.
Hope all this helps...
GA