As South Africans continue to battle with Stage 6 loadshedding throughout this weekend, Eskom workers affiliated to the National Union of Mineworkers (NUM) are demanding a 15% salary increase across the board. The trade union confirmed that it has officially submitted its wage demands to the beleaguered power utility with negotiations set to start next week. Amongst a raft of other demands made by NUM include increases in housing, medical aid and cellphone allowances. We spoke to NUM's Eskom Chief Negotiator, Olehile Kgware…