Ali Saleh al-Barrak, CEO of Saudi Electricity Co, has said that US firms have expressed interest in taking part in tenders to build a group of power plants that will boost capacity by an additional 30,000 megawatts, Reuters has reported. 'Many of the firms that we met in the US showed their readiness to work with us as investors, while others showed interest to work as contractors, and based on that they will submit bids for us to study,' Barrak said.