Wall element for a system, in particular for a presentation, sales or exhibition stand and/or for shopfitting, comprising the current-conducting wall element and a current collector for an electrical consumer, which is designed to be fastened to the wall element; wherein the wall element comprises a carrier plate with a front side and a rear side; wherein the wall element comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks (11, 12) are configured alternately at least in sections; wherein the first electrical conductor tracks and the second electrical conductor tracks are configured on the front side of the carrier plate; wherein the current collector comprises a plurality of at least two contact needles (21a-21f), the wall element being configured such that the current collector can be fastened to the wall element in such a way that at least one of the contact needles (21a-21f) contacts one of the first electrical conductor tracks and at least one other of the contact needles (21a-21f) contacts one of the second electrical conductor tracks; and wherein the wall element comprises a first electrical connection contact and a second electrical connection contact, wherein the first electrical connection contact is electrically conductively connected to the first electrical conductor tracks, wherein the second electrical connection contact is electrically conductively connected to the second electrical conductor tracks, wherein the first electrical connection contact and the second electrical connection contact are configured on the rear side of the carrier plate; wherein the first electrical conductor tracks and the second electrical conductor tracks form an interlocking comb structure; wherein the first electrical conductor tracks form a first comb and the second electrical conductor tracks form a second comb, wherein for at least one of the two combs the teeth of the comb structure are configured on the front side of the carrier plate, characterised in that a web of the comb structure connecting the teeth is configured on the rear side of the carrier plate. wherein the wall element comprises a carrier plate with a front side and a rear side; wherein the wall element comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks (11, 12) are configured alternately at least in sections; wherein the first electrical conductor tracks and the second electrical conductor tracks are configured on the front side of the carrier plate; wherein the current collector comprises a plurality of at least two contact needles (21a-21f), the wall element being configured such that the current collector can be fastened to the wall element in such a way that at least one of the contact needles (21a-21f) contacts one of the first electrical conductor tracks and at least one other of the contact needles (21a-21f) contacts one of the second electrical conductor tracks; and wherein the wall element comprises a first electrical connection contact and a second electrical connection contact, wherein the first electrical connection contact is electrically conductively connected to the first electrical conductor tracks, wherein the second electrical connection contact is electrically conductively connected to the second electrical conductor tracks, wherein the first electrical connection contact and the second electrical connection contact are configured on the rear side of the carrier plate; wherein the first electrical conductor tracks and the second electrical conductor tracks form an interlocking comb structure; wherein the first electrical conductor tracks form a first comb and the second electrical conductor tracks form a second comb, wherein for at least one of the two combs the teeth of the comb structure are configured on the front side of the carrier plate, characterised in that a web of the comb structure connecting the teeth is configured on the rear side of the carrier plate.