Sensor Wire Shielding Question

This Arduino will be in a residential area, outside in a weatherproof non metallic box. There will be ten analog sensors inside the A/C compressor unit. All the sensor wires will go through a conduit. The distance between the Arduino and the sensors will about six to eight feet. The power wires are in a separate conduit but not far away.

Do I need to worry about shielding the sensor wires?

Shielding or not.... That depends on the noiciness of the machinary being measured. Relays and large motors probably generate noise. Make a try without shielding for one sensor and see what it looks like. Shielded 2, 3 ,4 wires don't cost much more.