▁South ▁African ▁Rail ways , ▁a ▁heav ier ▁main line ▁version ▁of ▁the ▁Class ▁ 2 1 ▁ ▁steam ▁locomot ive , ▁the ▁Class ▁ 2 2 ▁, ▁was ▁proposed , ▁but ▁never ▁built . ▁The ▁Class ▁ 2 2 E ▁is ▁therefore ▁the ▁first ▁locomot ive ▁in ▁South ▁Africa ▁to ▁receive ▁this ▁class ▁number . ▁ ▁Character istics ▁The ▁locomot ive ▁body ▁is ▁a ▁w eld ed ▁mon oco que ▁design , ▁constructed ▁of ▁steel ▁pl ates ▁and ▁profile d ▁members . ▁The ▁Class ▁ 2 2 E ▁locomot ive ▁is ▁virt ually ▁identical ▁in ▁visual ▁appearance ▁to ▁the ▁earlier ▁Class ▁ 2 0 E ▁and ▁Class ▁ 2 1 E ▁locomot ives , ▁but ▁longer , ▁with ▁a ▁different ▁wheel ▁arrangement ▁and ▁a ▁different ▁interior ▁layout . ▁ ▁It ▁has ▁a ▁nom inal ▁rating ▁of ▁. ▁This ▁is ▁the ▁second ▁type ▁of ▁modern ▁Co - Co ▁design ▁electric ▁locomot ive ▁to ▁join ▁Trans net ' s ▁fleet ▁after ▁the ▁heavy - d ut y ▁Class ▁ 1 5 E , ▁which ▁is ▁used ▁on ▁the ▁S ish en - S ald anha ▁( O re x ) ▁route . ▁Both ▁these ▁locomot ives ▁are ▁single ▁cab ▁types . ▁ ▁Layout ▁ ▁The ▁Class ▁ 2 2 E ▁has ▁a ▁single ▁cab ▁and ▁a ▁gang way ▁along ▁the ▁centre ▁of ▁the ▁locomot ive , ▁while ▁the ▁interior ▁layout ▁and ▁pla cement ▁of ▁equipment ▁is ▁as ▁follows , ▁from ▁the ▁cab ▁towards ▁the ▁rear : ▁ ▁Left ▁side ▁ ▁Air ▁condition er .