Ivacuum yegumbi lokucisha i-arc kufanele ihlolwe ngezikhathi ezithile enkonzweni, indlela yilena: vula i-Switch, sebenzisa amandla kagesi kagesi angu-42kV kumakhefu ayo avuliwe, uma iphikelela.
ukubukeka kwe-flash-over, igumbi lokucisha i-arc kufanele lithathelwe indawo elisha.