An $$electrical $$cabinet $$

$6$

$\text{'}$

$$high $$x $$

$3$

$6$

$\text{'}$

$\text{'}$

$$wide $$x $$

$1$

$8$

$"$

$$deep $$must $$be $$supplied $$with $$a $$rapid $$purge $$rate $$when $$the $$cabinet $$is $$initially $$closed $$after $$being $$open$.$The $$rapid $$purge $$rate $$must $$displace $$four $$volumes $$of $$the $$cabinet $$size $$in $$

$2$

$$min$.$During $$the $$high $$purge $$rate $$the $$air $$is $$carried $$out $$of $$the $$cabinet $$through $$a $$safety $$valve $$set $$at $$

$0$

$.$

$3$

$"$

WC

$.$

$$The cabinet manimitains a $0\mathrm{.}1"$WC pressures with a $.$m