WET SUITS 



291 



Electro-Oceanic s 59 F2F female bulkhead connectors with51F2M male connectors 



Electro-Oceanics 51F2F female connectors mated to Electro-Oceanics 51F2M 

 male connectors 



DPDT neutral center off toggle switch 



SPST toggle switch 



20 amp fuse 



15 amp fuse 



Fig. IIZ. Silver-zinc cell used 

 to power electrically heated wet 

 suit 



AC Umbilical Cable and Power Control 



The ac umbilical power cables and control boxes were designed to permit heating power 

 to be derived from a source within Sealab H. The design of the cable included consideration of 

 the desired cable length, the total resistance of the heating circuitry, and the voltage of the 

 power source. The power source voltage was chosen as 24 volts by the contractor through con- 

 sultation with NMRI and the U.S. Navy Mine Defense Laboratory. This choice determined that 

 the voltage drop in the cable at full suit power would be 12 volts and that the cable resistance 

 would equal the resistance of the suit circuit. The selection of cable wire gage followed. 



The ac power-cable design consists of 100 ft of two-conductor No. 12 AWG cable spliced 

 to 18.5 ft of two-conductor No. 14 AWG cable. The inboard connector selected was a Cannon 



