Quick Question About Wire Connection

Heaters need periodic replacement, so I'd keep it simple.

Ideal High Temperature Wire Nut® Wire Connectors, Wire Nuts

Don't know how important looks and tidiness are to you, but this is what we used on our injection molders and thermoformers.

I would use a bus connector, or as a last resort a split-bolt....

The bronze split bolts in that photo are likely the only things you will find at a hardware store.

You can get ceramic terminal blocks if the connections are going to be exposed (remember standard plastic terminal blocks will likely deform and melt due to the heat).

If the connections can be covered to prevent finger access then uninsulated crimp connections could be an option.

Safety first, always.

Additionally this is all assuming the heater cartridges are bare rather than already fitted with a cord. If your heaters do have cords then fit plugs to the ends and use a 4-way outlet board for safety (assuming your wall outlet can handle the current). This allows a safer connection that can be easily connected and disconnected.

Again safety first.

What are the wire gauges of the various items to be connected?

What wattage???

High temperature terminal strip. Ceramic body. Terminals pretty much touch safe recessed into the body of the ceramics. Rated for 1000º F. Cost for of 4 terminal strip like $3.00 US McMaster Carr.

In that the info is not given as to how far out of the heat the connections will be. If far enough set a junction box and use wire nuts. I've used cartridge heaters that had 36 inch leads that ran thru a harness into a panel. Where they were terminated right on the SCR controlling them.

You may use a metallic junction box (JB) with ceramic terminal blocks inside the JB.

Can't believe nobody suggested this :