E32.REV

PIPE TRACING SYSTEM

NOTE: FINAL DATE: JUNE, 1988.

NOTE: USE MI CABLE ONLY FOR PROCESS HEATING OR REQUIRED BY OWNER. USE SELF REGULATING CABLE FOR PIPE FREEZE PROTECTION

NOTE: THIS SECTION CALLS FOR MI CABLE. DO NOT USE FOR SELF-REGULATING CABLE

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for a system of heating cables, wiring and controls

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION No. 1 and Section GENERAL PROVISIONS FOR ELECTRICAL WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECION

B.	Related work in the following Sections:

1.	RACEWAYS.

2.	WIRE AND CABLE.

3.	LOW VOLTAGE CIRCUIT BREAKER SWITCHGEAR.

4.	POWER, CONTROL AND ALARM WIRING SYSTEMS.

5.	GROUNDING SYSTEM.

6.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for additional Reference Standards

4)	QUALITY ASSURANCE

A.	Field verify location, length and size of heat traced piping and insulation covering

B.	Refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for Guarantee and other Quality Assurance requirements

5)	SUBMITTALS

A.	Submit shop drawings including catalog cuts of cables and controls, size, length and dimensional layout, including piping and test results

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Cables and controllers: Nelson Electric and Chromalox.

B.	Transformers: General Electric, Westinghouse, I-T-E, Square D and Sorgel

2)	CABLES

A.	Provide hot section consisting of two conductor copper alloy resistance wire, mineral insulated, covered by annealed seamless copper sheath and of a size and length as indicated

NOTE: SCHEDULE ON DRAWINGS. VERIFY WITH OTHER DEPTS., THAT PIPE INSULATION "K" FACTOR IS .45 OR LOWER

B.	Provide cold section consisting of two conductor, copper, size as required, mineral insulated, covered by annealed seamless copper sheath and a minimum 7 ft. long

3)	CONNECTIONS AND TERMINATIONS

A.	Provide silver soldered connections and terminations including end cap to end of hot section, hot to cold cable sections and sleeve connector and cold cable end to insulated leads

4)	CONTROLS

A.	Control thermostat assembly:

NOTE: NORMALLY SPECIFY NEMA 4 (WATERTIGHT). FOR OTHER TYPES SEE DESIGN GUIDE

1.	Provide in-line type, similar to Nelson No. TH-410, in NEMA 4 enclosure with voltage as required, 10 ft. long capillary, nickel-chrome plated copper bulb and 0-100 degree F. temperature rating, set at 35 degree F

NOTE: ADD FOR CRITICAL PIPING. IDENTIFY ON DRAWINGS. INDICATE WIRING FROM ALARM THERMOSTATS TO MECHANICAL ALARM PANEL, OR TO LOCAL "ALARM INDICATING PANEL" BELOW, AND THEN A SINGLE INDICATING ALARM WIRING FROM LOCAL ALARM INDICATING PANEL TO MECHANICAL ALARM PANEL

B.	Combination control and alarm thermostat assembly:

NOTE: NORMALLY SPECIFY NEMA 4 (WATERTIGHT). FOR OTHER TYPES, SEE DESIGN GUID

1.	Provide in-line type, similar to Nelson No. TD-410, in NEMA 4 enclsoure with voltage as required, 10 ft. long capillary, nickel-chrome plated copper bulbs and a 0-100 degree F temperature setting, set at 40 degree F for control and 35 degree F for alarm

NOTE: MAY BE REQUIRED WHEN ALARM THERMOSTAT IS SPECIFIED. LOCATE ON DWGS. PROVIDE 120 VOLT POWER SUPPLY

C.	Alarm indicating panel:

NOTE: AVAILABLE WITH 6, 12 OR 24 INDICATING LIGHTS.

NOTE: NORMALLY SPECIFY NEMA 4 (WATERTIGHT). FOR OTHER TYPES, SEE DESIGN GUIDE

1.	Provide panel in NEMA 4 enclosure, framed, with directory, indicating location of heat traced pipes, with ----- lights, relay to activate remote panel, test and reset switch

NOTE: CONSIDER FOR SHORT LENGTHS OF PIPE.

5)	TRANSFORMER

A.	Primary shall be 120 volt.

NOTE: AVAILABLE AT 12, 24, 36 AND 48 VOLTS.

VOLT

B.	Secondary shall be ----- volt.

NOTE: IF DIFFERENT SECONDARY VOLTAGES ARE REQUIRED, SCHEDULE ON DWGS

C.	Secondary shall be as indicated.

VOLT

NOTE: AVAILABLE AT 500, 1000 AND 2000 VA.

CAP

D.	Capacity shall be ----- va.

NOTE: IF DIFFERENT CAPACITIES ARE REQUIRED, SCHEDULE ON DWGS.

E.	Capacity shall be as indicated.

CAP

NOTE: NORMALLY SPECIFY NEMA 4 (WATERTIGHT). FOR OTHER TYPES, SEE DESIGN GUIDE

F.	Provide in NEMA 4 enclosure.

NOTE: CONSIDER FOR SHORT LENGTHS OF PIPE. WHEN INSTALLED IN SERIES, CABLE WILL DEVELOP HALF OF NORMAL POWER. AVOID IF POSSIBLE, ALTERS WAVE FORM, COULD CAUSE ELECTRO-MAGNETIC INTERFERENCE

6)	HALF-WAVE SILICON RECTIFIER

A.	Voltage shall be 120.

NOTE: AVAILABLE AT 5, 10 AND 20 AMP.

AMP

B.	Ampere shall be -----.

NOTE: IF DIFFERENT SIZES ARE REQUIRED SCHEDULE ON DWGS.

C.	Ampere rating shall be as indicated.

NOTE: NORMALLY SPECIFY NEMA 4 (WATERTIGHT). FOR OTHER TYPES, SEE DESIGN GUIDE

AMP

D.	Provide in NEMA 4 enclosure.

7)	TAGS

A.	Supply cables with tag, indicating length, voltage, wattage, resistance, size of hot and cold sections, and pipe system protected

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Unroll cables in straight line without kinking.

B.	Lay hot section for single row on top side of pipe and for double run on top side, 60 degree down on either side of vertical

C.	Secure in place by stainless steel straps at 18 inch intervals

D.	Install sensing bulbs at underside of pipe.

E.	No cable bends shall be installed within 6 inches of silver soldered joints

F.	Protect cables from damage.

G.	Connect cold end to junction boxes with acceptable fittings.

2)	TESTS

A.	Prior to shipment, subject each cable to high potential test of 1600 volt 60 Hz for one minute from conductor to sheath. Resistance readings shall be not less than 20 megohms with 500 volt DC ohmmeter. Subject each cable to 140 percent of rated voltage for one hour

B.	After cables are secured in place and prior to application of insulation, megger cables with 500 volt DC megger from conductor to sheath. Resistance readings shall be not less than 20 megohms. After application of insulation, retest cables