Appleton U-Line™ Factory Sealed 15 and 20 Amp Plugs and Receptacles Catalog Page

Plugs and RecePtacles: nec/cec HazaRdous location

© November 2016

U-Line™ Factory Sealed 15 and 20 Amp Plugs and Receptacles

Explosionproof, Dust-Ignitionproof

Dead-Front Safety Construction – Grounding through Extra Pole and Shell.

CEC:

Class I, Division 1 and 2 Groups B, C, D
Class II, Division 1 and 2 Group G — Coal Dust
Class III
CSA Type 7BCD, 9G

Illustrated Features

Spring door cover keeps dust out of receptacle when plug is 
not in use, which may be rotated 180° or completely removed. 
Stainless steel cover spring-completely enclosed for protection 
from corrosive environments. Cover may be used with hinge at top 
(standard) or rotated 180° to put hinge at bottom.

Factory sealed receptacle/switch interior. Switch is an integral 
part of receptacle interior, contained in an aluminum sleeve. 
Protective xylan coating on inside of sleeve provides smooth 
”rotating” action of internal switch, which is activated by rotating 
plug in receptacle. Entire aluminum sleeve is sealed at both ends 
with neoprene O-rings to protect receptacle/switch interior against 
moisture.

With plug in use, neoprene 
gasket in throat of receptacle 
”seals” around plug keeping 
out dirt, water, dust and other 
foreign matter.

With plug not in use, spring-
loaded door seats against 
neoprene gasket to seal 
receptacle from corrosive 
atmospheres.

ECP Interchanger plug fits ordinary location receptacles (NEMA 
5-20R or 15R and NEMA 6-20R) and explosionproof U-Line™ 
receptacle as well competitors comparable NEMA blade configured 
receptacles.

Solderless lugs—all terminals are pressure type to facilitate wiring.

Longer plug housing for better gripping and easier plug insertion 

and withdrawal.

Knock-out in plug insulator permits ”potting” of terminations for 
positive protection in severe environments.

A twist of the plug produces audible ”click” to indicate fast make 
and break of built-in switch contacts. Twisting plug locks it in 
place—cannot be accidentally pulled out.

For safety... Ordinary location 
plug will NOT activate 
explosionproof U-Line™ 
receptacle.

Special neoprene watertight plug bushing accommodates 
flexible cord ranging from .538” to .639” in diameter.

Plug mechanical cable clamps 
on the plug prevent strain on 
cables and meet or exceed UL 
150 lb. strain relief pull-out test 
for classified locations.

394

Plugs and RecePtacles: nec/cec HazaRdous location

© November 2016

U-Line™ Factory Sealed 15 and 20 Amp Plugs and Receptacles

Explosionproof, Dust-Ignitionproof

Dead-Front Safety Construction – Grounding through Extra Pole and Shell.

CEC:

Class I, Division 1 and 2 Groups B, C, D
Class II, Division 1 and 2 Group G — Coal Dust
Class III
CSA Type 7BCD, 9G

Receptacle and Cover Assembly

125 Vac, 1 HP 250 Vac, 2 HP

Description

20 Amp ECSK-2023 ECSK-20232

Mounting Box — Complete with 1 Close-Up Plug

Hub Size Catalog Number

Single Gang

3/4” ECS175

Catalog Number

Two Gang

Dimensions in Millimeters (Inches)

Cover Mounting Box

1” ECS110

3/4” ECS275

1” ECS210

395