Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from a non-metallic polymer that will not rust or corrode. The cable rack arm is adapted for mounting to existing underground stanchions or for stanchions of a more modern design. Each cable rack arm is securely mounted to the stanchion. Each cable rack arm then supports one or more cables in cable rests or saddles molded atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Plastic cable ties may be used to secure the cables to the cable rack arms. Nonmetallic pins may also be used to secure the cable rack arms to the stanchions. The stanchions may be made of nonmetallic composite material that includes a fiberglass cross-layered knitted apertured mat for increased strength.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from reinforced non-metallic polymers that will not rust or corrode. A cable rack arm up to thirty inches long may be compression molded with long glass fibers in a polyester or vinylester matrix. Each cable rack arm is securely mounted to a non-metallic stanchion that may be made from a reinforced, pultruded composite material. Nonmetallic pins may be used to secure the cable rack arms to the stanchions. Each cable rack arm then supports one or more cables in cable saddles that are snap-fit atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Each saddle may include elastomeric dampening material to reduce shock and vibration in the mechanical and electrical environment in underground tunnels, vaults and manholes.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: Conduit spacers useful in preparing duct banks with reduced electromagnetic fields (EMF) are disclosed. The conduit spacers are designed to maximize phase cancellation of EMF from a closely-spaced series of electric power cables placed in conduits supported underground by the conduit spacers. The spacers are also designed to minimize the EMF above ground by reducing the distance needed to bury the cables for a given EMF above ground. In one embodiment, the spacers place conduits adjacent one another for maximum cancellation of a single three-phase cable installation. In another embodiment, the spacers place conduits adjacent one another for maximum cancellation for a dual three-phase cable installation, including cross-phase cancellation, e.g., A-B-C and C-B-A.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from reinforced non-metallic polymers that will not rust or corrode. A cable rack arm up to thirty inches long may be compression molded with long glass fibers in a polyester or vinylester matrix. Each cable rack arm is securely mounted to a non-metallic stanchion that may be made from a reinforced, pultruded composite material. Nonmetallic pins may be used to secure the cable rack arms to the stanchions. Each cable rack arm then supports one or more cables in cable saddles that are snap-fit atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Each saddle may include elastomeric dampening material to reduce shock and vibration in the mechanical and electrical environment in underground tunnels, vaults and manholes.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from a non-metallic polymer that will not rust or corrode. The cable rack arm is adapted for mounting to existing underground stanchions or for stanchions of a more modern design. Each cable rack arm is securely mounted to the stanchion. Each cable rack arm then supports one or more cables in cable rests or saddles molded atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Plastic cable ties may be used to secure the cables to the cable rack arms. Nonmetallic pins may also be used to secure the cable rack arms to the stanchions. The stanchions may be made of nonmetallic composite material that includes a fiberglass cross-layered knitted apertured mat for increased strength.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from a non-metallic polymer that will not rust or corrode. The cable rack arm is adapted for mounting to existing underground stanchions or for stanchions of a more modern design. Each cable rack arm is securely mounted to the stanchion. Each cable rack arm then supports one or more cables in cable rests or saddles molded atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Plastic cable ties may be used to secure the cables to the cable rack arms. Nonmetallic pins may also be used to secure the cable rack arms to the stanchions. The stanchions may be made of nonmetallic composite material that includes a fiberglass cross-layered knitted apertured mat for increased strength.

Abstract: A cable rack arm and support system suitable for underground power and communication service is made from a non-metallic polymer that will not rust or corrode. The cable rack arm is adapted for mounting to existing underground stanchions or for stanchions of a more modern design. Each cable rack arm is securely mounted to the stanchion. Each cable rack arm then supports one or more cables in cable rests or saddles molded atop the arm, thus keeping the cables accessibly organized in a manhole, tunnel or vault. Plastic cable ties may be used to secure the cables to the cable rack arms. Nonmetallic pins may also be used to secure the cable rack arms to the stanchions. The stanchions may be made of nonmetallic composite material that includes a fiberglass cross-layered knitted apertured mat for increased strength.