Spanish to English Tech/Engineering Electronics / Elect Eng Electrical Equipment

Diagrama unifilar de suministro energía

Este diagrama debe indicar a que circuito de los asignados a la instrumentación va conectado cada uno de los equipos que requieren suministro eléctrico.

Actually, my problem here is related to the word order I have assigned to the translation.

My translation of the text is detailed as follows:

This diagram must indicate to which circuit of the ones assigned to instrumentation is connected each equipment requiring power supply.

To me, it sounds too literal. Any suggestion.