ALCO Rectifier Ordering Code/Model Number for Junction Boxes

1. TYPE
   • TB = Terminal only
   • TB-S = Terminals & Shunts
   • TB-SR = Terminals, Shunts & Resistors
2. ENCLOSURE (suggested nema 3r when using resistors)
   • Fiberglass (standard) —————- Nema 4x
   • Galvanized 16ga (standard) ———– Nema 3r
   • Galvanized Hot-dip 11ga ————– Nema 3r
   • Aluminum —————————– Nema 3r or 4x (specify)
   • Aluminum/Anodized ——————– Nema 3r or 4x (specify)
   • Aluminum/Anodized/Clear coat ——— Nema 3r or 4x (specify)
   • Stainless Steel ———————- Nema 4x
   • Explosion Proof (cast aluminum) —— Class 1 Div. 1
   • NOTE: Nema 3r (vented) ——– Nema 4x (sealed)
3. SHUNT TYPE and RATING
   • RS (wire shunt) 5 amps
   • SS (stainless steel) 25 amps
   • SW (brass block)5, 10, 15, 20, 25, 30, 50, 75, 100, 200 amps
4. TERMINAL LUG
   • KA-4C = #14 – #4 wire
   • KPA25 = #4 – 1/0 wire
   • KPA-28 = 1/0 – 4/0 wire
5. RESISTORS (1-ohm standard)
   • 25 watt – 1-ohm —– (5.0 amps max.)
   • 50 watt – 1-ohm —– (7.07 amps max.)
   • 100 watt – 1-ohm —– (10.0 amps max.)
   • 300 watt – 1-ohm —– (17.3 amps max.)
   • Space Only ( for future resistor or resistance wire)
6. SPECIAL FEATURES
   • Reostats ( Specify size – Watts/Ohms)
   • Ammeter with Switch
   • Conduit knock-outs in box (Specify size and qty.
   • Specify other