All the lines of Delhi - Sarai Rohilla and Patelnagar are not electrified.
Lines of Delhi ring rail services are fully electrified.
In attached pics, you can see the electrification work is going on at DEE and further towards Rewari.
All the trains coming from Rewari side at go at any station DEE/VVKP/DLI/NDLS.
A...
more... new line is also laid which is not on platforms and train 54012/11 is experimentally diverted through this non-electrified line from Delhi sarai rohilla to New Delhi.