Mineral insulated heating cable – Thermon MIQ Mineral Insulated Heating Cable v.1 User Manual

Page 8

MIQ

Mineral Insulated Heating Cable

Completing the Installation . . .

1. Begin fi nal cable attachment by securing the end of

circuit and working back toward the power supply.

• MIQ mineral insulated heating cables are typically

installed with tie wires or stainless steel banding at
30 cm intervals. Use only Thermon approved banding.
Do not over tighten banding or tie wire. These cables
may also be installed with heat transfer compound and
metal channels.

• Avoid crossing series constant watt heating cables.

• If applicable, refer to installation details provided with

the project drawings or contact Thermon for additional
information regarding installation.

2. Before making power connections, the MIQ cable

should be tested to ensure electrical integrity with at
least a 500 Vdc megohmmeter (megger) between the
conductors and the metal sheath. IEEE 515 and
EN-IEC 60079-30 recommend a test voltage of 1000
Vdc for mineral insulated cable. Minimum resistance
should be 20 megohms.
(Record 2, Checklist on Page 9)

Hot to Cold Junction

MI Heating Cable

Cold Lead

Gland Connector

Stainless Steel Tie Wire

or Banding (Typ.)

3. MIQ series resistance heating circuits are typically

prefabricated at the factory. Junction boxes to complete
a typical MIQ circuit connection to power may not be
supplied as part of the system. For Ex d sets, use only
Ex d connection fi ttings. For Ex de sets, use only Ex
e connection fi ttings. Refer to Installation instructions
included with power/splice enclosures or contact
Thermon for additional information.

4. Route MIQ cable set cold lead(s) into junction box

hub(s). Slowly tighten gland connector with set of
wrenches until ferrule begins to make positive contact
with cold lead sleeve and cold lead can not be moved by
hand. Then tighten fi tting 1/8 additional turn.

5. Secure temperature sensor (if required) to pipe utilizing

stainless steel banding. Locate temperature sensor as
shown in Illustration B.

Illustration J: Typical Installation. . .

15 cm