Belden 638AMJ 004, CMP 4C#16+4C#18+3P#18FS+2C#18 YEL

Belden 638AMJ 004 is a plenum-rated access control cable for access control, security system, and power limited controls installations. It features stranded bare copper conductors with Flamarrest® insulation and an overall Flamarrest® jacket. Only the card reader pairs are protected by an overall Beldfoil® shield and Flamarrest® jackets. The construction includes 3 pair(s), 18 AWG plus 4 conductor(s), 16 AWG; 4 conductor(s), 18 AWG; and 2 conductor(s), 18 AWG, and it is rated 300 V (UL CMP) with a 0°C to +75°C operating temperature range.

Key Features

• This plenum-CMP access control cable is rated 300 V (UL CMP) for indoor plenum installations.
• It uses stranded bare copper conductors with Flamarrest® insulation and an overall Flamarrest® jacket.
• Only the card reader pairs include an overall Beldfoil® shield with 100% coverage and a 24 AWG (7x32) TC drainwire.
• The conductor build supports mixed access control wiring: 3 pair(s), 18 AWG plus 4 conductor(s), 16 AWG; 4 conductor(s), 18 AWG; and 2 conductor(s), 18 AWG.
• It is tested to NFPA 262 and listed to NEC / UL compliance: Article 800, CMP.

Technical Specs

Cable Type & Environmental Suitability

Cable type	Access Control Cable
Environmental suitability	Indoor - Plenum, Indoor
Operating temperature	0°C to +75°C

Conductor Construction & Configuration

Conductor construction	All conductors stranded bare copper with Flamarrest® insulation
Card Reader conductors	3 Pair(s), 18 AWG, 7x26, BC - Bare Copper
Door Contact conductors	2 Conductor(s), 18 AWG, 7x26, BC - Bare Copper
REX/Spare conductors	4 Conductor(s), 18 AWG, 7x26, BC - Bare Copper
Lock Power conductors	4 Conductor(s), 16 AWG, 19x29, BC - Bare Copper

Insulation, Shielding & Jacket Details

Card Reader insulation	PVC - Polyvinyl Chloride; color code: Black & Red, White & Green, Brown & Orange
Door Contact insulation	PVC - Polyvinyl Chloride; color code: Black, Red
REX/Spare insulation	PVC - Polyvinyl Chloride; color code: Black, Red, White, Green
Lock Power insulation	PVC - Polyvinyl Chloride; nom. insulation diameter: 0.075 in (1.9 mm)
Card Reader shield	Tape; Bi-Laminate (Alum+Poly); 100% coverage; drainwire: 24 AWG (7x32) TC
Card Reader inner jacket	PVC - Polyvinyl Chloride; 0.288 in (7.32 mm); ripcord: Yes; color: Orange
Door Contact inner jacket	PVC - Polyvinyl Chloride; 0.154 in (3.91 mm); ripcord: Yes; color: White
REX/Spare inner jacket	PVC - Polyvinyl Chloride; 0.180 in (4.57 mm); ripcord: Yes; color: Blue
Lock Power inner jacket	PVC - Polyvinyl Chloride; 0.206 in (5.23 mm); ripcord: Yes; color: Gray
Outer jacket	PVC - Polyvinyl Chloride; nom. diameter: 0.548 in (13.9 mm); ripcord: Yes

Physical & Mechanical Specs

Overall cable diameter (nominal)	0.548 in (13.9 mm)
Max. pull tension	235 lbs (107 kg)
Bulk cable weight	166 lbs/1000ft (247 kg/km)

Performance & Electrical Characteristics

Card Reader nom. conductor DCR	6.6 Ohm/1000ft (22 Ohm/km)
Card Reader nom. inner shield DCR	13.1 Ohm/1000ft (43.0 Ohm/km)
Card Reader nom. capacitance Cond-to-Cond	40 pF/ft (130 pF/m)
Card Reader nom. capacitance Cond-to-Shield	72 pF/ft (240 pF/m)
Card Reader max. current	4 Amps per Conductor at 25ºC
Door Contact nom. conductor DCR	6.6 Ohm/1000ft (22 Ohm/km)
Door Contact max. current	4 Amps per Conductor at 25ºC
REX/Spare nom. conductor DCR	6.6 Ohm/1000ft (22 Ohm/km)
REX/Spare max. current	4 Amps per Conductor at 25ºC
Lock Power nom. conductor DCR	4 Ohm/1000ft (13 Ohm/km)
Lock Power max. current	5 Amps per Conductor at 25ºC

Compliance & Certifications

Flammability / reaction to fire	NFPA 262
CEC / C(UL) compliance	CMP
European directive compliance	EU CE Mark, EU Directive 2015/863/EU (RoHS 2 amendment), EU Directive 2011/65/EU (RoHS 2), EU Directive 2012/19/EU (WEEE)
APAC compliance	China RoHS II (GB/T 26572-2011)

Related Part Reference

Non-Plenum number	538AMJ

Applications

• Use it for access control installations where multiple conductors are needed to connect common door hardware and reader wiring needs.
• It supports security system wiring in indoor environments, including indoor plenum spaces.
• Choose it for power limited controls installations where a 300 V (UL CMP) plenum-rated cable is required.

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