Emerson Nelson Installation Manual

Fast, easy installation of
heat tracing systems

Nelson™ AX and EX Heat Trace Connection Kits

A complete range of heat trace connection kits for the most demanding environments.

Connect heat trace cables safely and
securely in harsh and hazardous locations.

NelsonTM AX and EX Connection Kits by Emerson, provide robust, weatherproof,
corrosion-resistant connections for heat trace cables in ordinary, rugged industrial
environments and hazardous locations.

• Fiberglass reinforced polyester construction withstands rugged conditions.

• Nonmetallic enclosures are suitable for use in extreme weather and corrosive
environments (IP66, NEMA 4X).

• Large, modular enclosures and DIN-rail mounted terminal blocks provide for easy
installation and service.

• Spring-clamp terminals simplify wiring and ensure a dependable connection,
with no need to tighten screws.

• LED indicating lights available for positive verication of connections to power
distribution.

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Nelson AX and EX Connection Kits are engineered to
adhere and exceed industry standards.

Specifications Certifications

• Minimum Installation Temperature: –40°C (–40°F)

• Ambient Temperature Use Range: –50°C to +55°C
(–58°F to +131°F)

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• Acceptable Conductor Size: 1mm

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6mm

(8 AWG)

(18 AWG) to

• Operating Voltage Range: 108 Vac to 300 Vac

• Max Continuous Current: Up to 25A in standard

congurations, 38A for -LLT options

• Enclosure Material: Fiberglass reinforced, carbon
impregnated, UV resistant polymer, black

• Weight: Splice and Power Connection Kits 1 kg (2.2 lbs)

• Weight: Tee Connection Kit 2 kg (4.4 lbs) Ingress Protection:
NEMA 4X, IP66

• Terminals: Spring-type terminals

• Lid Screws: Stainless steel captive screws

®

2017; NFPA 70: National Electrical Code®, International :

NEC
Electrical Code, IEEE Std 515TM - 2011 Standard for Testing, Design,
Installation, and Maintenance of Electrical Resistance Heat Tracing
for Industrial Applications

— Class I, Division 2, Groups B, C, D
— Class II, Groups E, F, G (Canada Only)
— Class III (Canada Only)
— Enclosure Type 4X, Temperature Code T6 – T3
— Class I, Zone 1; Ex e II; T6 – T3 

— Class I, Division 2, Groups B, C, D
— Class II, Groups E, F, G; Class III
— Enclosure Type 4X, IP66,
— Temperature Code T 
— Class I Zone 1; AEx e IIC T

— -40°C ≤ Tamb ≤ 55°C

—

II 2 G Ex e IIC T6-T3  Gb

—

II 2 D Ex tb IIIC T80°-T195° C

—

-40° C ≤ Tamb ≤ +55° C

For temperature code, see heating cable or design information



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