Frequently asked questions
What is the difference between the Power & Control Cables?
What is the difference between Unsheathed & Sheathed Single Core
Cable as per IS-694?
What is the
difference between Control & Instrumentation Cable?
What is the difference between Thermocouple & Instrumentation
Cable?
What is the difference between Armoured & Unarmoured Cable?
What is a
Co-Axial Cable?
What are the
different types of PVCs and what are its normal
working temperatures?
What is the
Voltage Grade?
Number of Strands
for:
What are the other Sizes of Strands in case of flexible Conductor?
Dia
of Strands for 1.5 Sq.mm can be:
What is the Core / Pair Identification incase of LDPE Insulated
Cable?
What
is the Purpose of Screening?
What are the different types of Screenings?
Which type of Screening is Cheaper?
Noise in Instrumentation Cable is called?
What is Thermocouple Extention Cable?
What is Thermocouple Compensating Cable?
Why there is no Compensating Cables for Tx, Jx & Ex Type T/C
Cables?
What will be the Normal Insulation Thickness for Telephone Cables?
What is
the difference between RTD / Instrumentation Cable?
What are the normal sizes of Control Cables?
What will be the normal Conductor sizes for instrumentation / RTD
Cables?
Thermocouple Cable Conductor normal sizes for:
What are the
standards for T/C Cables?
What is
the Temperature Tolerance (+/- deg. C) allowable for Thermocouple
cables?
Colour code as per IS 1554 for Core constructed Cables?
What are
the 3 types of Braided (Metal Braiding) Cables manufactured?
What is the Temperature with standability of PTFE & Fibre Glass?
Frequently asked questions
What is the difference between the Power & Control Cables?
Power Cables - No. of Cores 2,3, 3 1/2 & 4 Core
Control Cables - Upto 63 Cores or above
Standards Applicable for both - IS-694 & IS-1554 .
What is the difference between Unsheathed & Sheathed Single
Core Cable as per IS-694?
Unsheathed - Only Core Insulation will be done and there
will be no Sheathing.
Sheathed - Sheathing will be done on Core Insulation.
What is the difference between Control & Instrumentation Cable?
Control Cables – They are generally Core Constructed.
Instrumentation Cables – They are generally Pair Constructed
with Shielding.
What is the difference between Thermocouple &
Instrumentation Cable?
Conductor Material is different for both.
What is the difference between Armoured & Unarmoured Cable?
a. Armour.
b. Inner Sheath will be provided for Armoured Cable before
Armouring.
What is a
Co-Axial Cable?
This type of cable is used for Very High Frequency (V.H.F.)
Applications.
What are the
different types of PVCs and what are its normal
working temperatures?
a. Insulation - PVC General Purpose (Type A) - 70 Deg.C
HR PVC (Type C) - 90 Deg.C
b. Sheath Material PVC St1 - 70 Deg. C
HR PVC / PVC St2 - 90 Deg. C
FRLS PVC - 105 Deg. C.
What is the
Voltage Grade?
Low Voltage Grade -- upto and including 1.1 KV
High Voltage Grade -- above 1.1 KV
Number of Strands
for:
a. Solid Conductor - One
b. Multistrand - either 3 or 7
c. Flexible - No of Strands above 7
-
Dia of Strands upto 0.3 mm .
What are the other Sizes of Strands in case of flexible
Conductor?
0.1mm, 0.15mm, 0.2mm & 0.3mm.
Dia
of Strands for 1.5 Sq.mm can be:
a. Incase of 7 Strands - 7/0.52
b. Incase of 0.3 mm dia each - 21 Strands
c. Incase of 0.2 mm dia each - 48 Strands.
What is the Core / Pair Identification incase of LDPE
Insulated Cable?
By Colour or By Number printed Al-Mylar Tape / Polyster Tape.
What
is the Purpose of Screening?
To reduce the interference by nearby sources.
What are the different types of Screenings?
a. Al-Mylar / Cu-Mylar Tape
b. ATC or ABC Braiding.
Which type of Screening is Cheaper?
AL-Mylar.
Noise in Instrumentation Cable is called?
Reduction of Accuracy of Signal passing through the
Cable.
What is Thermocouple Extention Cable?
Thermocouple Element material & Thermocouple Cable Conductor
materials are same.
What is Thermocouple Compensating Cable?
If the Electrical properties of the Conductor material used for
the Thermocouple Cable is almost similar to that of Thermocouple
element material it is called Compensating Cable.
Why there is no Compensating Cables for Tx, Jx & Ex Type T/C
Cables?
This Thermocouple Element material itself is cheaper.
What will be the Normal Insulation Thickness for Telephone
Cables?
a. Core Insulation - 0.2, 0.3 mm
b. Sheath - 0.5 to 1.2 mm.
What is the
difference between RTD / Instrumentation Cable?
RTD Cables will be Triad Constructed.
Instrumentation Cables are Pair constructed.
What
are the normal sizes of Control Cables?
1.5 & 2.5 Sq.mm
What will be the normal Conductor sizes for instrumentation
/ RTD Cables?
0.5, 0.75, 1.0, 1.5 & 2.5 Sq.mm
Thermocouple Cable Conductor normal sizes for:
a. Single pair - 16 AWG (1.295 mm dia)
b. Multi pair - 20 AWG (0.813 mm dia)
What are the
standards for T/C Cables?
IS-8784, ANSI MC 96.1 (Please refer our Catalogue for other
Standards.)
What is the
Temperature Tolerance (+/- deg. C) allowable for Thermocouple
cables?
a. IS 8784 +/- 3 Deg. C
b. ANSI MC 96.1 +/- 2.2 Deg. C
Colour code as per IS 1554 for Core constructed Cables ?
a. Upto 5 Cores by different colours i.e for 2 Cores Red &
Black, for 3 Cores Red, Yellow & Blue, for 4 cores Red, Yellow,
Blue & Black, for 5 Cores Red, Yellow, Blue, Black & Grey.
b. Above 5 Cores : One Core Yellow and One Core Blue remaining
Grey in each layer (or) any single colour with numbers printed.
For above 5 Cores Grey with number printing is our normal
practice.
What are the 3 types
of Braided (Metal Braiding) Cables manufactured?
a. Annealed Tinned Copper Braided Cables.
b. Annealed Bare Copper Braided Cables.
c. Nickle Plated Copper Braided cables
d. G.I. Braided Cables.
What
is the Temperature with standability of PTFE & Fibre Glass?
PTFE - 250 Deg.C,
FG Cables 400 Deg.C
Please write to info@thermocables.com for details.
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