Question
Which one of the following is the value of voltage drop, in milli volts per ampere per metre, for a 4mm^2 multi-core flat thermoplastic 70^circ C cable, intended to supply a single-phase circuit? a 11mV/A/m b 7.3mV/A/m. square C 18mV/A/m square d 29mV/A/m
Answer
4.1
(295 Votes)
Glenna
Elite · Tutor for 8 years
Answer
b.
.
Explanation
## Step 1:This question pertains to knowledge about voltage drop in a multi-core flat thermoplastic cable. The voltage drop is a decrease in electrical potential along the path of a current flowing in an electrical circuit. It is usually measured in millivolts per ampere per meter (mV/A/m).## Step 2:The voltage drop in a cable depends on the type of material, the cross-sectional area, the length of the cable, and the current flowing through it. In this case, we are given a 4 mm² multi-core flat thermoplastic 70°C cable, intended to supply a single-phase circuit.## Step 3:The voltage drop value for this type of cable can be found in electrical engineering handbooks or cable manufacturer's data sheets. According to many data from engineering handbooks and codes, a 4 mm² multi-core flat thermoplastic 70°C cable has a voltage drop of approximately 7.3 mV/A/m.